I checked through the sticky, it seems that early on at least, it was recommended to force stop fermentation at around 1.020 gravity for wild yeast and it seems that it can range anywhere from one to 3 weeks in the primary. Lower than that, sometimes seemed to have created off flavors. I can't say for sure since I've not done that. And I've only heard about vinegary when there's some sort of other infection, like with the ...brett...something that turns the alcohol into vinegar. You might be referring to the different flavors that some people have found when it drops below 1.020ish.
I've just done a yeast one that went a bit short, (Personally, I think I mismeasured my gravity.) And that was a week and a half for primary, week and a half for secondary before bottling. It didn't taste too bad on the sample, but because I potentially mismeasured, I'm going to try to drink them a bit sooner than normal.