In my EMB ground school class (Aug. 6th), all but 1 out of 12 of us new-hires had no 121 experience. A couple of them in there were actually given the option of the RJ or the Bro, and chose to go for the Bro (both were domicile-based decisions). On the other hand, a good buddy of mine was in the RJ class ahead of me and he was the only one out of 30 in there with zero 121 time. So, long story short, yes some people can end up straight into the RJ, but it's typically given to those who have worked previous 121 gigs.