Some impressions from a boat-builder in the USA:
1) Curent currency exchange rates probably make products priced in US dollars look attractive to folks on the other side of the pond.
2) Some US companies (for example, Bluejacket, Harbor Models, Microglass) offer top-quality products and efficient, helpful, reliable service. Others (no names, please) tend to exhibit a variety of faults: exhorbitant prices; persistent lack of inventory; slow/shoddy/hostile service; and, from time to time, outright nuttiness (the proprietor of a Mom-and-Pop business once scolded me while I tried to place an order because my phone call interrupted his nap). My experience with ordering by mail from UK companies generally has been much better.
3) As for US hobby shops...well, the less said, the better, in many cases. Shops that cater to the model boat hobby are few and far between, and the "general interest" shops that do have a boat section usually treat it as if it were an unwelcome step-child. The situation is somewhat better when it comes to building supplies, but not by much; once again, lack of inventory and unhelpful service are the root causes of the problem.
By the way...You folks in the UK might complain about Tony Blair, but at least he's on the way out. Over here, another Clinton might be on the way in.