TLDR: Better choice for DD if you don't need AWD
I'll be buying a new car within a year to be my DD. This ST and the WRX are on the top of my list. I'm definitely leaning towards the ST though.
I live in California, where I don't need AWD to deal with snow. I do make a few Tahoe trips each winter, but I would usually take my brother's AWD crossover. Other than that, AWD is good for launching off the line. I am interested in getting some track time in, but it would be either autocross or circuit, not drag strip.
If you don't need AWD for snow or launching, then all it's doing is wasting gas through weight and more drivetrain loss.
The ST should hold similar power to a WRX from a roll (15 less hp, but just 3003 lbs), but we'll see what dynos actually say. It should be able to deliver that power reliably with its electronic torque vectoring system to reduce the symptoms of torque steer. It sounds to handle great based on this preview:
2013 Ford Focus ST First Ride - Feature - Car and Driver
It will get great gas mileage for the segment. The new Ford Escape with the same engine, but weighs ~3600lbs will get around 30mpg. It has a great interior with Recaro seats and Sync.
Of course keep in mind, most ST information is speculation. But driving dynamics, gas mileage, interior seem to all be wins. Power is there as well, just a hair below the MS3 and WRX, far ahead of the VW GTI, but just a hair below the MS3 and WRX. Less weight helps some though.
Euro spec sheet:
The last page shows hp/torque curves. I like the look of that max torque at 2k rpm. We'll see if it transfers over to the real world.