Just how short an attention-span do they think we have?

Ok, given that a high percentage of this Blog's readership doesn't watch Tele-Vision, this may be a waste, but:

This morning I heard a radio spot promoing Alias, with the delectable Jennifer Garner.

"From the producers of Desperate Housewives..."

What the?!?!?????!!!

OK, so a lot of people thought Season 3 was on the weak side, and the season debut is 3 months late, but come ON!

The real question is, do they know something I/we don't?

Just how short is the attention-span of the American mass-media consumer?