We got ~70 people for sanctioned Vintage on Friday at Gencon this year with advance knowledge that champs wouldn't be there. Isn't that the largest sanctioned vintage event in the United States thus far?
We had 237 guys playing sanctioned Vintage at Vintage Champs in 2013, but 70 guys playing sanctioned Vintage is still impressive.
Not a huge fan of Pastimes, as the prize support for Vintage Champs (when I was there at least) was bad. If you're into gamer culture and GenCon appeals to you on more than the Magic level, it's worthwhile. I'm not really, so once Champs was given to Nick, I no longer had incentive to attend. Still, to each his own.