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I agree @zwirzu that DD@H is only testing GPU mining but if you look at the charts it has affected the RAC output and earnings dramatically. Nevertheless, I have modified the text above to reflect your comments, thanks.

For CPU which one is most profitable?? I read the instructions how to choose projecs but there is no simple answer there. Only criteria I know is to choose that with les users.

I'm planning to publish a number of articles in the coming weeks where I hope to support the community in this selection process. It will based on the "calculated RAC per CPU" from where you can calculate the amount of Gridcoins per day based on the table above.