It was shocking, seeing the Nats actually finish off a series, but they did it and swept the Red Sox right out of their own building. This can be both undersold and oversold searching for a narrative.
If you want to oversell it as a "defining series" : We all have our biases and for some beating the Red Sox in Fenway still holds a lot of cache, but the fact is this isn't your Irish twin older brother's Red Sox. They have repellant starting pitching and the Nats missed the only guy on the team holding it together somewhat (Josh Beckett). They got Felix Doubront, a talent who's yet to prove he can start in the majors, Dice-K who was only GOOD in 2008 (Really. Look it up) but still gets trotted out there as if this year he'll get it, and a maddening Jon Lester who has seems all season to be just on the cusp of getting back to what he has been, but he never gets over that hump.
If you want to undersell it as a "Red Sox stink" thing: A sweep is still impressive. The Red Sox still hit, and that dichotomoy (great hitting, terrible starting pitching) is enough overall to be around .500. You can't expect to go into a .500 teams place and sweep them. If you like your team you expect 2 wins, if you don't maybe 1. You can take a look at the 50+ games the Nats played before coming to Fenway for a dozen examples. But this time the Nats got three. Best of all it didn't feel like fluke wins, like bad error by the Red Sox, a closer just blowing up for them, an odd terrible pitching day from their best starter. Watching those games you felt like the Nats were the better team on the field - no question and to look that way versus a decent team in their place is worthy of all the praise and good vibes you want to have.
But in the end, the narrative, as boring and repetitive as it may be, hasn't changed. The Nats have great pitching, especially their Top 2. They held the Red Sox to 9 runs in 3 games. That's what won them the series.
Now it's off to Toronto to face some decent pitching. Sweep the Red Sox and the Nats are cementing their place as a legit playoff/division threat. Sweep the Blue Jays and you can legit start talking best team in the majors.
Not so Quick Notes (answering some comments):
Am I too biased for the AL East? Possibly. I even admitted as such. But the AL East teams outside of Boston do have good starting pitching. The Yanks, Jays, and Rays all have 3+ guys with better ERAs (it works for WHIPs too, if you prefer) than the Red Sox 2nd best guy and their staffs are all better than league average in R/G. The Yanks and Jays are not even close to the Nats but that's not the point I'm making. The Orioles are below average in R/G but if you catch the wrong 2 starters, they plus their dominant pen can win the series. But the sweep of the Sox makes my 6-9 much harder to get to - they Nats basically have to be swept by someone, and I didn't have that in my head as a possibility as they play the cream of the AL East in DC.
Desmond had a good enough weekend for his supporters to possibly pop back out and say something (I'm looking in the direction of your twitter feed Rocket Bill). I have nothing against the guy. He's fine. But to be a winning team - the type that wins 93+ games and division titles season after season - you need to have several dominant offensive players. You can't sit around with Bryce Harper and a team full of average guys*. Therefore you have to cut bait occasionally with actually ok guys, hoping to land someone better. The key is having someone in place that has that potential and is not significantly worse. I can accept that you don't think Lombo has enough potential, or that we've also seen enough of Danny, for them to be that guy. I personally don't give them big chances to be stars, but at least I give them chances, which is more than I give Ian. (*You know I like Zimm to be better than average - the point is you need several and the Nats are relying on a lot of "if" here. If Morse/Werth is healthy and can play good and don't age quickly. If Ramos/Flores/Espy can take it to the next level. If LaRoche or CF X can be another great bat. Great teams don't have a lineup with 6 ifs.)
The Nats are 12 games over true but remember a LOT of that 12 games over came from that 14-4 start when they did have Zimm, Ramos, and Werth, they've been about a .500 team since. (WHICH IS GOOD - being .500 with important pieces of your offense out for long stretches -stop reading this as an insult). It's too early to say what Morse has brought back to the team but if the Nats go 8-8 over this set of games that would be great and on target with getting the team to the playoffs. .500 against the good teams, better versus the rest. Rinse. Repeat. Playoffs.