This is an important point. I found out about a week ago that at least at Verizon, the brick and mortar stores actually compete to some degree with the carrier's own on-line website, and that sales reps receive commissions for selling devices. If a device is priced higher (i.e. is a higher-end device), that probably means more money in pocket for sales reps. In addition, with the HTC Trophy I just bought earlier this week, there was a $120 on-line discount for the device ($30 on 2 year contract) relative to the price at Verizon stores ($150 on a 2 year contract). If the on-line prices for various devices undercut the prices that are available in the store, that's a disincentive for sales reps to push that device in the store.
One other, related story - just last night I went to one of the local Verizon-owned stores to try to buy screen protectors for my new Trophy (which I received on Thursday, a day earlier than I expected). When I asked the rep at the store if they had any, he said the Trophy (the smartphone, not the screen protectors) wasn't in stock anymore, despite the fact it was still on display no more than 15 feet away. I pointed out the Trophy was still on display, and they checked to see if they had screen protectors in stock (which unfortunately they did not).
I'll note that in my experience having gone to probably at least 10 different Verizon-owned stores and having talked with sales reps directly or indirectly to sales reps at most of those stores (by indirectly I mean listening to what reps are telling or not telling other people), I'd say most Verizon store reps have played down the HTC Trophy. However, the reps who did not play down the Trophy (I know I've met at least 2 such reps) really spoke positively about WP and the Trophy.