I did my pvt se in 40 days at an FBO, and then my Instr. just 30 days after that, but again as de727ups said, I had a dedicated flight instructor, and since he knew I was commited to flying all the time, he'd give me priority on air-craft and instructor scheduling. Now keep in mind I was also working full time while still flying.....Stressful yes, but I accomplished it!
Now I gotta work on my ME elsewhere, as the FBO doesn't have a ME airplane.