I'd imagine this is going to be mildly contentious, but I'm going to say it:
I think McLaren's 2013 driver line-up is going to be their weakest for 30 years.
Over the years they've had weak cars (mid-90s particularly), but they've had a World Champion or future World Champion among their ranks since 1982 (John Watson and Andrea de Cesaris being the last pair of McLaren teammates who never won a drivers championship, in 1981).
Of course I haven't forgotten that Button has won a title before, but, and I'm being quite brutal here, I think the car won him the title and he had a relatively weak teammate, in much the way Vettel hasn't often been pushed by Webber (both of which pains me to say) – strong drivers, but never anything more than number two drivers. I also know Button pushed and beat Hamilton in 2011, but Hamilton had a particularly poor year and it would always be the exception to the rule, had they continued to be teammates.
Perez too may be a future champion, but I've said this before, I think the car is flattering him slightly, and my opinion is that he's going to be good, but I can't see him winning a title if he has a car equal to an Alonso, Hamilton or Vettel.
And that's it. Alonso is an all-time great. Hamilton has the ability to be (though you feel he needs to lose the wanton celebrity status). Vettel in all likelihood is soon to be a triple World Champion, so at the very least, statistically a great (we still need to see him up against another top driver though). Kimi is clearly a great driver, though he's not won as many titles as he should have. Hakkinen is a borderline great. Senna is arguably one of the true legends. Prost is a four-time champion. Lauda a triple champion.
As hard as I try, I just can't put Button or Perez among any those drivers.
PS, this isn't a reaction to the race. I wrote this while the forum was unavailable.