I like baseball, but I can't sit there and watch it from beginning to end. I read somewhere that the actual "play time" of a 3-hour game is around 9 minutes. So, basically, you are just watching 2 hours and 51 minutes of anticipation.
I seriously doubt it is THAT low. Maybe 15-20, for a game of about 7 runs scored. Heck, it very well could be that low for a 1-0 no-hitter.
It does bring up a good point though:
In this increasingly immediate gratification society, when so many are calling for a faster game of baseball, almost nothing is being done. Sure, apparently Selig (moron) has made a few MINOR changes, but that Reds/Phillies game last night just felt so damn long (and what a debacle for the Reds). I think playoff games take even longer, if I'm not mistaken.
So will baseball attendance slowly erode (even more so) because of the lack of patience becoming the norm for the coming generations? Too many games. A sport that NEEDS ties, yet doesn't have them (and that's compounded by the excessive games reason). Time between pitches ungodly. Batter and pitcher "timeouts". Long times between pitcher changes. Just about everything about the sport is a bore-fest. The only excitement is when a batter makes contact, and that feeling is fleeting. It only truly gets exciting when there's a question of whether a runner can advance/score off a hit.
I can watch baseball...as long as I'm doing something else. Only watched the Reds game last night because I was with some friends playing Pitch.
I find basketball increasingly annoying for the lack of rules enforcement on ball carriers, but at least it's ongoing action (except the last two minutes of a game.

) Hockey is nonstop as well, with the added physical attribute. Football is sporadic because of the time between plays, but I think that problem is mitigated by the fact that it's physical, and the plays tend to last longer than a play in baseball.
Edit: Let's add soccer. America finds it boring. Why? Basically a few seconds of exciting play, joined by boring back-and-forth play between the teams. I can watch soccer as well, as long as I'm doing something else, like baseball.
I predict that baseball's popularity will slowly decay, as it has been for years because of all this. Unless they make changes, I just don't think it'll be able to hold America's interest.