Sorry, I wasn't trying to be insulting or anything, as an OSX user, it just looks very similar to me, and I was hoping someone would point out a difference in p

Sorry, I wasn't trying to be insulting or anything, as an OSX user, it just looks very similar to me, and I was hoping someone would point out a difference in philosophy or implementation, not that the dock was used pre-OSX (which I'm sure it was). There was no reason to insult my eye-sight :-)