Having worked in a company that had such a split before, I'll admit to having been a bit resentful of being on the 'D' side.<p>In many cases someone would decide that a particular problem (not a bug, but maybe something like optimisation of threading strategy for scalability) needed the 'R' folks to look into it. Invariably what came back weeks later was something that I could have come up with in an afternoon, but without a PhD I wasn't considered clever enough to put forward such stuff.<p>Still, apparently when the money was tight the Rs were the first to get axed...