EV of playing in high-limit games with pros on FTP

[ClaytonN]

Saw a certain 2+2'er playing some 15/30 LHE with Perry Friedman (and at times, David Grey). Perry's a semi-pro, but I'm fairly sure David Grey is known for playing in really, really high stakes games.

Things I would openly consider:

1) Level of play of FTP pro playing stakes significantly lower than what they usually play
2) Abilities of FTP pro regardless
3) Attraction of lesser-skilled players to higher limits for the "celebrity factor"

Is a 15/30 game with an FTP pro better or worse than a normal game?

What are your thoughts on this?