Hmmm, my ppd was wayyyy down so I had a look through my individual hosts. It seems like since switching to MIP, the PPD on both my 1800X (both linux) rigs has fallen to around half of what they were getting with SCC. Strangely the 6700k & i3-4170 (both windows) don't seem to have been affected the same, so it's probably that MIP prefers running in a Windows environment to Linux, could also be it prefers intel processors but I'm betting on the OS.
Thought I'd give you all a heads up anyway.
edit: I'll get on of the 1800x rigs crunching in windows to see what happens, otherwise setting custom profiles to keep linux rigs on the SCC project might be a good idea.
edit 2: Hmm, 3 day work buffer dammit. And also looks like I've been getting a selection of work, not just MIP.