My dealer also said the momentary pause is the layer change. He suggested, though wasn't sure, that the additional heat may be due to the additonal laser for the video (are there TWO separate lasers?) or the different angle of the video laser, but admitted he was only guessing. He also suggested I bring my remote in and test it on a store model to see about the need to press twice. The problem is particularly noticeable on the open/close and the pause buttons.
Another dealer I saw later in the day, who doesn't sell the unit but personally performs an audio upgrade on the unit by reconstructing the analog stage for $1500 (Yes! $1500! He said it makes the unit a world beater with no need for an outboard DAC), thought it might be because DVD's spin faster than CD's, but he wasn't sure either.
I'm going to call Sony direct on this.
BTW, Lowell, I'm also using all Snell for surround.