Turbo MTTs, why aren't there any?

[DCJ311]

There are a few on Full Tilt, but on Pokerstars I see nothing other than the turbo satellites, which are fairly low buyin normally ($3-33).

Why are sites so apprehensive toward offering these? They are about 1/3 as long to run and offer a bigger market than regular MTTs, because most people don't have the time to play for 6+ hours. This is win-win since the site attracts more volume, and the tournaments are shorter so they make more $/hr.

Has there been any comment on this issue from the sites themselves? I've emailed Pokerstars a few times but they just say they're looking into it. If you play SNGs or look at the tournaments running you'll see that the majority of them are turbo based. Why wouldn't that carry over to MTTs?

Is there a demand for these from the MTT community? Please post and email Stars if so.