slow/ fast / respectable?

You should be bracket racing, look at those ETs for the first 2 slips,,,,wow, 1/1000 of a second difference between the 2.
Nail your reaction time and you'll be bringing home some wins. :)

For what you have at a mile high I would agree you're doing OK. Are you dumping the clutch and spinning on a street tire with those 60ft times?