[phish]

Generally true, except for a couple of things:

The best casino pros tend to play many games well, whereas the best online pros are one-dimensional.

Playing live, the casino pro would notice tells and reads that the online pro would not be aware of and may be giving out himself.

In general, casino games are much softer than online games and the pro there can focus completely on the one game. His edge is much bigger and hence any downswings are also much smaller.

Online pros talk about trying to win 1bb/100 at the 100/200 games. That would translate into about 0.40BB/hour live. A good casino pro should be able to make 3 to 4 times that playing 200/400 (or even higher) mixed games.

In general, I think the best holdem players today are online, but not true of other games.