KC,

I agree sir.

Here is a video I took of a single wall in some pretty mild weather:
http://www.youtube.com/watch?v=TNzPkXSoixo

Insects are a none issue with a simple 13 oz nest so that argument goes out the window.

The single wall pitched above did just fine in the 40 mph measured wind above like it was. If it got much more than that I'd batten down the hatches, but then there is still enough breeze to keep the condensation down. I don't depend on my tent to keep me warm. Just dry. My clothing and sleeping bag keep me warm. Driving rain hasn't been an issue from what I have seen either.

Like I said aside from winter camping and mountaineering its hard to justify a double wall tent giving the weight and space you get compared to a single wall.