http://www.dow2live.com/
Current game replays with commentary, most players there are pretty good, though they aren't ALL good 
It's a RTS game that focuses mostly on the tactical over strategy. That is, the economy/basebuilding/tier system is much more streamlined to focus on actually micro'ing combat, which is much more diverse and tactical than Starcraft (blob -> click -> use some abilities, nothing has proper range and they bump into eachother forming half-circles, why micro a fight when you can spend those clicks macro'ing to overwhelm your opponent blahblah ).
First skirmish typically happens within 30 seconds of the game start and combat is pretty active through the entire 20-30 minute game (1v1 tends to start a little slower and have a few more pauses in combat).
Basically, if you play RTSs to actually KILL stuff rather than BUILD stuff then DoW is filled with 20 minutes of killing stuff 
However, even the most "epic" 100 pop-cap battles in DoW are going to be smaller in scale compared to most other RTSs (especially Supreme Commander). It's a squad-based game and so you typically don't have more than 5-6 individual units to control at any given time. However, units actually survive more than a few seconds in combat, and squad/unit preservation is VERY important and there are several mechanics in place to ensure that your units escape to fight another day.
