i agree that it matters on both slope but also type of grass.
even though i think we all understand by now that many of the golden era architects built their courses with green speeds of about 5-7, i too enjoy them when they are faster, however, i really dont think the speed is as much of a factor if toughness in putting as is wether a set of greens putts true or not.
while there is something to having a home course advantage by knowing the greens so well, as well as an added advantage of having a really good caddie, there is nothing that toughens up a course more, or slows up play more, than greens that simply don't putt true.
te paul, i think the answer you are going to get on this subject is going to vary on region in which we all play, up north i def. think people are going to prefer the faster the better. down south, that may not be the case.
by the way, with your talk regarding contours of greens, and "softening" them, could you be talking about a neighboring course of ours that is the neighbor of the course that hosted the senior pga?