Yes, thank you for waiting. Had you not waited, I wouldn't have been able to wipe almost your entire team with my super or the rockets I just picked up. Joking aside, some maps you can wait a pretty long time whereas others (like Pantheon) you pretty much shouldn't wait at all. The other downside of waiting to pull heavy is that you are delaying your ability to get into position, allowing your opponents to control lanes. This isn't a big factor in all maps, but it does matter a lot in some.