Oh, I didn't mean most, just that there must be some. I've had transactions not get in the next block. And when that happens it usually takes a few blocks to get. Now that I'm thinking about it, maybe I'm wrong. The delayed transactions may only have happened when I sent ~10 and usually all but one would get in which means there aren't miners who only take fees. Maybe miners that usually take zero fee, but delay with some probability? Seems unlikely. I also thought I'd seen others having the same issue, but I didn't look carefully.

This was over a month ago, but I assumed it still happened and I just wasn't seeing it because I'm sending less often now.