It was for me but then I may have gotten lucky. I added an 8 core AMD to my GPU rig to mine Primecoin just a few days before ProtoShares launched. I solo-mined PTS for a couple days and the entire rig paid for itself in the first 24 hours. So, you might get lucky or you might spend a year mining XPM to make your money back.
Ok, its clear is very important to start mining the new cpu coins as soon as they are launched and know the right time to sell.
I want to know if that XPM proffitability calculator is accurate.