I'm not sure I was quite clear when I said 'taller'. I mean we don't have good height comparisons for everyone other than Sirius was "noticably" taller than Snape in OotP. But in DH Voldemort makes a note of James's height (he notices the 'tall' man as he looks in the window of Godric's Hollow) and then when Harry sees his parents, Remus, and Sirius Harry has reached his father's height. So while I personally like to see Harry and Snape at roughly the same height, I just don't like seeing the DanRad size Harry unless, as you say, he's actually younger than 17.