I knew that would spark some debate. I'm not trying to piss anyone off here. How many DSM's make 270whp on 15-17psi from a t25?

I sure haven't seen one. Although I could be wrong. I don't think so. I've seen 2 DSM's (2g's) with the 20g and both were closer to 4k rpm for full boost.

One was at charlies shop, and made lots of horsepower, broke the tires loose in 4th from a roll, but took over 4k to get full boost. The other was at Sunshine, the kid was complaining about his new turbo, and how he could only run an 8.4 because of the lag this turbo had. It was also a 20g. This one was from a GReedy kit, IIRC.