From an enduro perspective, 28h is a much more common drilling for hubs and rims - particularly for deep rims (my wheels, like many on the market, are 24/28). It's not the number of spokes that's important, it's the spacing at the rim, and the deeper the rim, the fewer spokes one needs. I don't think I've seen 80mm rims with 32 spokes, and even 50mm rims look like they're all spoke in 32h drilling.
I've seen plenty of powerful people use wheels with allen bolts - including in international competition (ie, world cup/world championship level riders). that said, I don't think that benefit of PW hubs is proportional to the price. They're nice, sure, but for track use I don't see much of a drawback to basic hubs like the ones that Formula makes (and everybody re-brands). I used DA hubs for a spell, and I missed the fact that I couldn't pop the axle out to pack and travel with them. Dia Compe makes some nice track hubs, and DTSwiss is making some now, too.