Welsh lack of concentration just prior to halftime

Once again we see Wales ahead with a couple of minutes to go to halftime. Lineout on samoan 22. We lose the lineout and end up going in 10-6 down. Maybe i am imagining this but i'm sure (and i would love to see the stats) that this is a pretty regular occurence as far as Wales go. Isn't that guy poring over his laptop in the box with Gatland supposed to be some kind of analyst? When the boys are doing this short sharp training, does it mean that when it comes to an actual game they feel that after 35 minutes the ref is going to blow up for halftime. Every time Wales play, this is the most nervous time for me as you can almost put money on Wales letting in a try or giving away a penalty.

We won that's all that matters, look ahead to Namibia and Fiji.
There was no way we were going to keep Samoa out for 80 minutes, Shaun Edwards set us a 12 point target of points to concede, we only lost 10, so Wales did well.