I now preference markets by response time, because so many don't allow sim-subs yet hold it for more than 100 days. One story might only get subbed three times in a year, especially if it makes it past the first round of slush on a regular basis, yet not the final cut. Makes me want to sim sub despite guidelines, though I haven't yet. If I was a well-known writer, or regularly making pro (or even semi-pro) sales, I wouldn't sim sub. But as a virtually unknown writer, it's hard not to. Yet I worry that the one time I do it, I'll end up stuffing people around and get some kind of black mark against me, knowing my luck.
It's a shame to hear mags insisting on rejections in batches, rather than as they go. Just makes it unnecessarily harder for the writer to sub elsewhere.
I really appreciate mags that get their first round rejections out quickly - and second round in a timely manner, or at least keep people updated - and I have no problem with being asked to wait to submit again.