nofollow is an attribute of the link. How can you say "dofollow" like it exisits if there is no dofollow attribute? All the word is, is a made up antonym of "nofollow" All dofollow is, is a made up internet slang term. I suppose one could make that arguement, if the arguement was that nofollow stopped google from following links. However thats not the definition of nofollow nor is that even being argued as everyone knows that google will follow all links regardless of the attributes placed on them. And proof of rel=nofollow being attributed already exists thus making it real. Go find proof of a rel=dofollow attribute and we'll talk if its real or not. Its made up
If anyone is using firefox browser it becomes very easy to check No Follow/Do Follow.The plugin highlights your visited pages if it has DO Follow link. When i checked it for DP it gave me YES !
It seems to help well enough. Check out the auto links in my signature. They all do pretty good in SERP. Though I'm pretty sure they don't pull in much traffic from DP itself though.