Currently, most of my packages include the CD of images with the rights to print and I know many clients prefer to print their own copies at their favorite 1-hour store. I've had a few come back to me upset because of the coloring, when they ordered professional prints the coloring came out as expected and the clients were thrilled.
This is a good blog that illustrates the difference between print shops. I know that pro prints usually cost a little more but to be honest it's worth is to know what your picture will look like once you get it vs. taking a risk on a local print through a drugstore and possibly ending up with a "tinted" version.
Check it out here.