Random late night thought on incubation

Do you think eggs in a large clump will pip quicker than a single egg?

I ask because I've got a clutch in the incubator right now. The clutch was 7 eggs, but 1 went bad in the first week.

There are 4 eggs in one box, and 2 eggs in another box. They're on the same shelf of the same incubator, and the 4 eggs all seem to be dimpling a little bit. They are on day 30, so I'm not really worried that they are dimpling early or anything like that.

However the other 2 eggs are still firm and plump. Do you think this is due to the 4 eggs generating more of their own heat? Do you think this would result in earlier pippers?

Thoughts? Not looking for an answer here or anything, just kinda wanting to know if you guys think it's a possibility.

Dimpling at day 30 is much too early. You need to raise the humidity for those. They don't start generating heat and causing the egg box to sweat until the last week or so. That's also when you'd see slight dimpling. They begin to collapse right before pipping. Much closer to day 60.

I can't raise the humidity. It's at 99% as they are suspended over straight water & vermiculite to prevent water splashing up.

All my clutches this year started to slightly dimple at around this time. It's not dimpling like pre-hatching dimpling...I will try and get a pic.

http://img.tapatalk.com/d/12/11/16/dypu2ezy.jpg

http://img.tapatalk.com/d/12/11/16/zerygusu.jpg

PS - Nevermind it looks like it's actually just the one egg with slight dimpling. The other one on the end has been mis-shapen from the beginning.

Bumping this up...What do you think?