Not sure why everyone (Colin included) is surprised by the tone and terseness of Harbaugh's answers, this is how he's always done press and interviews. When he had to do his weekly radio spots in SF, it was no different. It's no different than Belichick muttering five words under his breath and Popovich's one word answers.
It only got weird went Colin had to go on his big speech and dump out on Harbaugh just to grandstand at how "difficult" the interview was and trying to make some weird point that his show has influence on recruits to get the last word in.
He coulda just kept rolling and thanked him for his time, but apparently Colin was offended that Harbaugh didn't give him some special interview?