Earlier today, in fact. But it's not so much the attention span thing that gets in the way (I play reeds, by the way) but the intellectual masturbation of a lot of jazz that turns people off.
I've yet to run into anybody who turns their nose up at, say, Dave Brubeck's "Time Out", which is certainly rhythmically sophisticated but tuneful, or Kenny Burrell's "Midnight Blue" (an album that's usually the first up for visitors). It's the "I'm an artiste, dammit" attitude, the cleverness for cleverness' sake, the removal of anything remotely engaging at a visceral level -- the attempt to emulate in the jazz idiom what Schoenberg perpetrated on "serious" music -- that forces people to decide that the Emperor is without skivvies to cover his shame.
Lyrical content is a red herring as well. There's a lot of dance crap (and some that's not crap) that gets heavy rotation in the wider world that is entirely word-free.
Okay, jazz is all about painting oneself into a corner and finding imaginative ways of escaping the trap you've set for yourself, but there's no harm in playing something that manages to capture a tune along the way rather than merely tracking the letter of the changes. Too many jazzers forget that it's still music.