Just to add one more thought,
Because we get caught up in the excitement of the new kittens, one of the things we tend to forget somtimes (me included) is that they are the queen's babies, not ours, and we need to respect that.
How would you have felt if right after you gave birth to your kids, someone came in, pulled them out of their beds, started taking flash after flash picture, messed with them constantly, just within the first few hours. You'd probably have a fit. lol Especially since you took her to the vet, which might have caused some stress...all the more reason to lessen it in other areas.
The more secure she feels with her babies, the less chance there is of her getting nervous or neurotic later on, and not being as good a mother as she could be. Remember that cats can't make the same value judgements as we do, and they can see any messing with their babies as a threat, even if it's someone they know, love and trust.
Better to not take the chance until they are a bit older.
I do beleive in interaction, just not in a lot of handling. From day one I'd lay down in front of her (less threatening) and the box, and would pet the kittens heads while they nursed, talked to them (as long as Mom allows it) but I did very little taking them out or messing with them, other than to roll them over to make sure their bellies were firm and round, and that all seemed okay. I don't even bother with the weighing unless I really was concerned a kitten wasn't gaining weight, and would only handle a kitten or take it out if it really needed me to do something the Mom couldn't do.
I'd take them out to change their bedding only when Mom left to use the litterbox or eat, and even then, just for the few seconds.
Again, once they open their eyes, it's a whole different thing. That's when you can start playing with them more (but even then, take the queen's cue).