Now if I understand correctly (because I've heard many people say it over the last 2 weeks) anyone who "knows footballs" at all can pretty easily tell the difference between a properly inflated football and one that's under-inflated by 2 PSI. This would mean that every Patriots QB, RB, WR, TE, Center, the people who caught Brady's 65 interceptions over that time, the dozens of Patriot and non-Patriot players that recovered the fumbles they did have, every guy on the sidelines who caught, picked up or threw back one of those passes when Brady tossed a ball out of bounds, and, of course, every official in basically every one of the last 128 games (not including playoffs) would have had to keep their mouth shut. Some for as many as 8 years and many who no longer (or never did) have ANY allegiance to the Patriots. No one told a reporter, and from what I'm seeing so far, no one told the league (Although if someone had told the league, that opens up a whole different can of worms).
I'm sorry, but I'll bet that's statistically LESS likely than the drop in fumbles occurring naturally.
I've read some interesting statistical analysis work on the fumble issue, here's another one:
http://regressing.deadspin.com/why-those-statistics-about-the-patriots-fumbles-are-mos-1681805710