No not trying to be commercially competitive but I just assummed almost everyone normalized to 0 or a hair under. Especially if your uploading your source for e-sharing.
For example, I just taped a Black Crowes show (16-bit) that I plan to share. Because of this thread I decided not to stress over levels and just dialed it in and let it ride instead of getting it just right so it hit 0. It sure was a lot stressful and easier to do and I ended up with a nice show and it looks like my highest peak was about -4.5.
Normally, I would just fade-in the beginning, fade-out the end, normalize (each channel seperately) to 0 and be done with it. Because of this thread I thought I would try an across the board compression on the whole show and make two copies for myself. One copy made using my normal method and a second copy where I tried some compression. Then I would listen to them both mainly just to learn what it does, how it sounds and to learn something for myself.
However, if I leave the copy that I plan to distribute at -4.5 w/o normalizing, I have a feeling my friends will immediately notice and make comemnts like "hey, this show has low levels compared to other stuff you've given me..."