Yeah, around 2-3, more people are leaving and it seems like you're the only one going in. If you drive, you can most likely find an up front spot.
Personally, I like BB better and tend to refer to TL as BB Lite. The family raft ride at TL is disappointing compared to BB's (especially the line for such a short ride) and Humunga Cowabunga is no Summit Plummet. So unless you're going for the tropical theming, the wave pool (beware, it's strong) or to swim with the sharks (the water is cold), I'd say head to BB. And if ou want to do Summit Plummet, be there when they drop the rope at 9am b/c by 9:15, the wait is already 1/2 hr.