I have heard that rumor about the type as well. I also heard that in Canada it was the same type for a long time and then changed it. The airlines pushed for that with the Beech 1900 and the King Air 300/350 adn eventually got it. However a good friend of mine flys at Comair on the RJ. We were comparing notes on the aircraft and determined although they are many similarities in the aircraft they are not really that close and there are aircraft with different types that are much more similar. ie, Gulfstream 3 AC model - Gulfstream 4.