General B&M Etiquette Question

[bconway6]

I have been hearing many players suggest that it is good practice to not look at your hole cards until it is your turn to act.
I realize this guarentees not giving away your future intentions, which is a good thing, and it also keeps any ambiguities out of the chop or not decision. I understand this decision is not made hand by hand, but as a general "yes I chop" or "no I dont chop". Thats to be discussed somewhere else though.
My problem with the not looking at your cards is that the games are slow enough at the lower limits as it is. Is it not in your best interest to act as fast as possible to get more hands played?
I understand at higher limits the game moves faster on its own due to competant players who at least know the rules. Also at these higher limits the telegraphing of your action before you act can be a big problem. Whereas the lower limit players are not going to notice or know to look and will miss it anyway.
So my question is; Does the decision to not look at your cards until its your turn to act apply to lower limit games? If so, what makes this a good move?