I tested more this weekend, with them temporarily sitting on the roof of my storage building. It has a nice SW facing roof side and about 20 degs off horizontal. I got around 323 watts yesterday, a few times, when the sun broke through the clouds. So that's about 107-108 watts. They didn't produce like that on Saturday, when the sun was out full time. The heat might have affected them, but it could have been some other variable that I haven't taken into account. I will test them more in the near future and see what they'll do. If I were going to mount them for full time use, I'd probably replace the wires and connectors, or make darn sure they would stay under the panels for UV protection, and to minimize the adverse effects of heat exposure.
I'm a little intrigued by the 100 watt HQST panels that Will tested in the 100 watt panel showdown video. But even they were only getting about 75 watts. So there'd be some level of trade-off there.