1.5 sec is a LONG TIME. My fastest draw and fire (FBI "Q" head shot at 3 yards) is 0.86 from t-shirt concealment out of an open top kydex holster. That was draw, press out, and fire at near full extention. And I wouldn't consider myself a super fast "quickdraw" guy.
Heck, Dave Sevigny holds the record on the Pistol-Training.com FAST drill with 2 head shots (3x5 box), a reload, and 4 shots into a 8" circle at 7 yards in 3.64 seconds. He could probably draw and dump a magazine in 1.5 seconds.
http://www.youtube.com/watch?v=qU3jceN4JAc
Another one... Todd Green from concealment on a reduced size target at 20 yards in 1.45
http://www.youtube.com/watch?v=BaCIs...eature=related
Granted, these are world class shooters, but I don't consider to be a 1.5 hit on target anywhere within 10 yards to be "fast".