i'd also suspect that ignorance is bliss for most people. they don't know a 32gb version might be coming....at some point. they also probably don't need it.
this would be an interesting poll of 16gb vs 32gb. on this forum 16gb probably would lead by a smaller margin, whereas in the real world it would lead by a more substantial margin.
just look at the most popular apps in the market now and how the majority of consumers use their phones. all of the most popular productivity and business related apps don't use a lot of storage either. the masses just don't need a lot of storage for apps. however, there is a subset that storage capacity is very important to. the carriers must know you guys have tons of patience and will wait it out...lol.