What Chuck says is largely true, what is also true , at least around me is the dissappering of the professional CFI. The days of the CFI who made that his vocation, and had a decade teaching and broad experience is rare. Expect your CFI to be about 350-450 hours TT, and having his apps out for a survey job. Many of the schools around here are heavy part 141, and have swarms of Indian and Chinese in the pattern on a given day. A few have older steam gauge PA-28's that actually are easy to rent because they are not much use to the 141 crowd. About 150 an hour hobbs is the gong rate.
As I have a 1946 Piper J3, and I am also in tune with the classic taildragger crowd, where you can still find your old school CFI with thousands of hours of dual, and he will teach you to be a great pilot, but they are near impossible to rent solo, and not practical for the 100 hamburger crowd, or actually going somewhere through controlled airspace, etc..