To be honest, I haven't driven many Subaru's, none of which were even closely modded to this level, so I don't have much to compare it too. My former car (my wife's car) was an 05 Forester XT stage 2. It was quick, but not nearly as fast as the Legacy. I actually feel G-force type of pull with this car. It does have a decent amount of lag, but I like being able to drive around and keep it out of boost to conserve fuel. It's perfect for me. It's been fairly cold the last few days and I've noticed that there is much less lag. When I hit the gas it's takes only about 1 second for it to really start pulling. Hard.
Interesting factoid: This car came straight from the dealership with all the aftermarket parts installed. Deadbolt didn't build this car, he just bought it from a friend/client who had all this done at the dealership before he drove it off the lot. The guy bought another car shortly after the Legacy and sold the Legacy to Jerry. Apparently, this guy goes through cars rather fast and found some sort of new exotic that he wanted more.