This trick works extremly well for fast money maps. Build probes for minerals until you need a pylon. Build a pylon, then a gateway, forge, assimalator, in that order. Build 3 more probes, build a cybernetics core. Then build a Citidel of Adun. Next build a row of pylons, with 4 gateways on each side. Now build a Templar Archives, and another Nexus (for minerals and vespane). Build 12 DT with your gateways and attack the computer. If it's a money map the comp should be really dumb, and if you attack soon enough, within about 15 minutes they shouldn't have any turrets, then just take out all their stuff (If it's a fastest money map they shouldn't have a comstat station, but it never hurts to check before you start attacking with your DT). If you master this trick you should be able to get DT in about 5 minutes. Good Luck!!!!
-Not recomended against humans-

CreepColony's Opinion: A dark templar drop on their command center is also effective.