Alright, my two cents on this. You are right to some extent, but the nature of those older RPs is more akin to a DnD game. It's not necessarily as story-driven, which is what aggrevates us more as we have to wait on people before continuing. If we just type a single sentence, it often isn't enough. There was this exact debate over what one wants to see out of a RP, and many people agreed that the converse would be more arduous, because you have to sift through numerous disorganized messages.
But in both cases there are extenuating circumstances beyond our control. We have had to replace our Littlefoot rper, for one, I think one of the rpers had to exit the other RP, and Chicken Run's host is a bit distracted. Now I'm not saying you guys are wrong. No, you actually have a point - the nature of these rps tends towards longer posts, and we have other priorities. Still, I know it's annoying and easy to get frustrated by lack of progress, but think of it in the shoes of the people actually role-playing, we feel that, but twenty times more.