Just to get back to the supposed point of this thread ... no wait, it seems to have been another Stitt-bashing thread, so I guess it has stayed on topic.
But the thread title implies something else, so: Can a coach, or staff, really "pump up" a team with rah-rah histrionics? Apparently, some can. But, by and large, motivation has to be internal. It's possible that that has become more so with today's athletes. Not too long ago, I had occasion to mix with a few younger collegiate players (friends of the son of a friend of mine). Near as I could tell, they went to at least three different schools -- all D-I. Perhaps they were trying to be "cool," but they seemed to agree that over-blown "pep talks" by the coaches were "embarrassing" and "insulting." A very small sample size and -- as I said -- possibly not really an honest reflection, but ... FWIW.
On a side note, bowl games sure tell you who is, or is not motivated. There have already been several "upsets" where it seemed obvious that the difference was motivation, not overall team talent (and the season records proved it). Right now, for example, Arkansas (7-5) is kicking the crap out of Virginia Tech (9-4), 24-0 at halftime. Say what you want about how strong the SEC is (or isn't), V-Tech came within a TD of winning the ACC, while Arkansas had a losing record in the SEC. The Razorback are playing with a purpose, while the Hokies seem to be just going through the motions. Could change at halftime ... but only if the V-Tech players decide to get in the game.