I like to be setup quickly, because I like to hunt far back and be good and set well in advance of other hunters. Like
@DaveT1963 mentioned, I usually have the smug satisfaction of having an arrow on the string before the next guy in starts tire crunching. Once the leaves are down, and especially if there's a little flood action, I can hear tires crunch over a mile away through the woods in some areas. I want to be setup in advance of those guys and hopefully allow them to stir stuff up.
But I think the key to fast isn't so much speed as it is familiarity with a simple system. Dave and I climb 2 totally different ways, but it seems both of us know EXACTLY where all our gear lives and EXACTLY what we're doing at any given moment. Get flustered or confused, or run into an unexpected difficulty, and you kill your setup speed.
And a lot of time gets list unpacking/organizing gear and "settling in." My dad can climb up a ladder stand and then take 15 minutes to "get comfortable." I pretty much set my tether, hang my bag and bow, nock and arrow, and sit still.