I've only done college radio (non-NPR affiliate) and therefore can only speak for that segment of the market. I was lucky to feel like I got a lot of psyched listeners on a Smiley Winters or Gerd Dudek trip, not to mention Ayler/Trane/etc., but hey, I wasn't one to play loads of Austin artists on KVRX, either, and probably should have (apart from a few in-studio live gigs and interviews).
But it seems to me that of the PR affiliates that I have heard playing jazz, Laz is doing a hell of a lot better than, say, whatever the hell was going on in Chicago years ago. I almost shit my pants hearing Andrew Hill on KANU-Lawrence in 1999, and though I know they didn't try REAL hard most of the time, it was still about as decent as one could hope for jazz on the radio in those days. I mean, with all the satellite radio/podcast/what have you now, it's gotta be difficult to walk that tightrope on real "air," so Winston-gaffes aside, it seems to me like Laz is doing a helluva job. I don't think I could do anywhere NEARLY as well as he.
And iirc Laz has posted playlists before, many of which escaped comment.