The G/S is by far the most time consuming. I am talking about doing a full time modular ie doing each module concurrently. The fully integrated courses are generally advertised as 14 months and the full time modular canusually be done in slightly less. I don't have the IR yet but these are the figures I have come up with in my research. If I am wrong, I am only quoting what the schools say and I usually preceed my quotes with "usually" and "about" which indicates the figures I give are not set in stone.
Cheers
Smith