I think it is because he was on the low hibernating in the studio and not coming out with 4 new releases and remixes a month like many other people out there.
His recent remixes of Solee - Impressed and also Pet Shop Boys - i'm in Love were both nothing short of amazing, and I just received his upcoming EP 'Atomic Soda' from his new album... and he is DEFINITELY back!
Stimming's new album is going to give him a run for his money, though. It's hands down one of the best I have heard in quite some time.. not a shoddy track on the whole release.
But Gui's is awesome as well.