Presumably this depends a lot on what the item is. I’ve definitely thought about and decided against an impulse purchase because of a locked case. It turns “ooh I need that” into “ah, but I have to find someone and delay things”.
Yeah, I have no doubt about this stat for an impulse item. I agree that I wouldn't wait on an impulse item. But for an item you "need" or specifically came for, I don't believe anyone would not wait.