With a normal 2,5°/sec rotation technique there is no real risk of a tailstrike, even in the simulator during that usual V1 cut. We use a boeing software and optimized take off settings which usually results in flaps 1 or sometimes 5, but we use up to 25 if needed.
Tailstrike risk is constantly assessed in out company via FOQA and actually the tail strike risk on both the 737-700 and -800 is extremely low. On the A320 and A319 the risk is pretty high though, but not on the A321 as pilots are much more aware of the long body length. However we did have a 737-800 tailstrike lately, the reason was performance calculated for the wrong weight, the classic thing, 57t instead of 75t.