No doubt that the twists and turns will be fast. I went up to ride I-305 on opening weekend, its transitions were absolutely unreal before they added the trim brakes to the first drop. Tim, just because a coaster is taller doesn't necessarily require that it have OTS restraints. Both Millennium Force (300 feet) and Top Thrill Dragster (400 feet) have the old style Intamin lapbars. After Intamin had a string of accidents that resulted in people being ejected from their rides, these restraints made their first appearances.
With that said, Kings Dominion modified the restraints on I-305 midway through the season. Instead of the hard foam OTS restraints with the lapbar, they were replaced with soft over the shoulder straps and lapbar. I didn't have a problem with the original restraints, but know a lot of people that got boxed in the neck pretty good from them. I haven't ridden since the new restraints were installed, but I understand that it made HUGE improvements to the overall ride.....hopefully this is what the coaster at BGT gets.