Depends on which checks
I do a thorough preflight before driving off, extra thorough (and checking for tampering) if the aircraft was left outdoors the night before (which happens very very rarely). This takes about 10 mins.
At the holding point, there are the higher-power (2000rpm) mag checks, etc, but these take only about 1 minute.
It takes me 8-10 mins from start of taxi to getting airborne, with the 8 mins possible if the wx is very warm. But it can't be done in much less time due to needing the oil temp in the green (90F) before doing the 2000rpm checks.
If somebody just starts up (in a piston) and flies straight off with a cold engine, they are IMHO nuts. I see renters do all kinds of stunts (not least because they are getting billed brakes-off to brakes-on) but I would not do it in my own plane.