I would agree with you. In a former life I had interactions with BB in a sales capacity. I sold into or had customers at many of the Top 50 "tech" companies. BB/Rim had one of the strangest, most insular cultures I came across. Maybe early on they felt really patronized by US/SV VC's/companies etc and so were anti US. Either way it was quite odd. I really wondered how that would end up working out for them.
It's hard to really put a finger on whether it's a part of being Canadian or whether particular businesses and corporations are constantly in search a state of denial. For the longest time, Microsoft was in the state of denial about their competition and refused to admit they were/are far behind them.
But on the other hand, you have Silicon Valley culture that tends to fuel adoption and promotion of products/startups in the Valley. So I feel as though while it's true that RIM/BlackBerry was for some time judged unfairly by Americans and Wall Street.
Yes. In general when I sold to Canadian companies one had to tread differently vs US companies. There is an inherent sort of reserve for US companies. Yet RIM went well beyond that (just one person's experience though)