60-75 is probably what they all run.
An interesting note I've been thinking about:
I'd say the extra 15mph is not worth the extra dangers.
When you think about it, if you're traveling 60 miles total drive distance in a tourney, it'll take you 60 mins at 60mph, and 48 mins at 75mph. 75 mph is a TON more dangerous than 60, or at least I feel much less "in control" at that speed. You only save yourself 12 minutes per 60 miles you travel in a single tourney at top speed.
I don't think enough of these guys do the math to see exactly how much time you're saving with that kind of increase in danger levels.
TBH 12, or even 20 minutes of fishing time really isn't much at all at least to me and rarely makes or breaks my fishing day, tournament or not. Then again, the only tournaments I fish are non cash-prize musky tournaments where all prizes are donations. Last one of last year's season I won myself a nice 7000i reel though