i run a Delta 1010 (NOT the LT) with Win2k Pro and have had no problems what so ever. in fact, i run it alongside an Audiophile 2496 for 10 inputs and have had nary a problem.
the Delta drivers for windows are pretty rock solid. your computer, OS config, and sysadminning skills, etc., of course, will vary from mine (i'm a systems engineer for my "real" job, so keeping a rock-solid machine in the first place is no problem for me).
YMMV,
wade