Time is something you never get back. Getting an IFR rating in 10 days is a heck of a lot easier and less time comsuming than spending month(s) trying to do it at a local flight school. I spent a year getting my PPL, mostly do to financial constraints. After doing that, the idea that I can get my license in 10 days even if their was a considerable premium would be well worth it to me.
Speaking of money, every flight school I've spoken to quotes about 10k (renting their plane of course) to get the IFR rating, so where I live PIC may be the same cost or actually come out cheaper, and PIC's instructor are professionals who aren't just doing instructing to build time.
@flyingron I'm glad I saw this thread & that you mentioned PIC, I spoke with them on the phone today and got some questions answered. Honestly, when I decide to fork over the money to get my IFR, I'll probably go for them instead of a local school.