Over here in Europe only very few triathletes ride a steep geometry and despite this they do very well in the races worldwide. If you stroll through T1 in a local race the vast majority rides shallow or standard road bikes. I have the impression that it is more like a "flavour of the month" to ride more than 76 degree seat angle. There were some hot "must-have-this" bikes during the last fifteen years which are forgotten now. Me, I do ride a Trek timetrial bike and I do agree that its overpriced but besides this I'm convinced that its very suitable for triathlon.
Frank
I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched C-beams glitter in the dark near the Tannhauser Gate. All those moments will be lost in time like tears in rain.