I've been noticing a lot more uptempo brass, New Orleans-style "hot jazz," and instrumental covers of easily recognizable pop songs mixed into the KPLU jazz format. Ever since Dick Stein made one of his obtuse remarks a couple of months ago about listeners who want to hear more brass.
Personally, I think it cheapens the over sound of their jazz format, by stretching it a bit too far into the Dr. John territory that usually defines their weekend blues format. They've been great at featuring a lot of piano, guitar, and small combos, and including enough medium and down tempo material each hour to be the only station on the dial where their music programming helped me to relax and decompress, and put a nice mood in the house. Now, about 1/3 of what I've been hearing during the day is starting to sound like toe-tappin' finger-snappin' muzak. Stuff that would probably sound better performed live at a classic car show than on my radio. I am not so much of a fan of the station's music mix anymore.
if you want to hear a jazz format that skews very heavy into brass and uptempo Latin jazz, try KCSM San Mateo, Calif. But in mostly-rainy, soft light Seattle (the sky, not the streetlights), I found the more relaxed sounds of Eliane Elias, Pat Metheney, Vince Guaraldi, and even Miles Davis preferable to the caffeinated sounds coming out of San Mateo and every other music format on my radio. They're still in rotation on KPLU, but the other material is taking it a little further into "fuzak" and "hot time" territory than I would prefer. And why there's actually more than one or two music formats in the genre you could call "jazz."