Thermolite vs Merino

The point of eVent is this:

In a two-fabric world (Paclite & ProShell, say), Paclite is not an option for a group of people on adequacy grounds, it's just too fragile for serious outdoor use. So you're left with ProShell. Along comes eVent. It passes the adequacy test - the stuff is tough. But it gives you: lighter weight, both from the fabric and design (no need for pit-zips with eVent!); greater breathability. Two massive pluses! There's basically not reason not to chose it - it is the better fabric.

You make a fair point on the breathability stakes (between eVENT and Proshell Goretex anyway)...at least in terms of the lab figures that both give.
However the fact that Gore-tex have been around for significantly longer as a company (and have an outstanding reputation), makes me trust their quality as a brand more so than a relative newcomer, if eVENT stand the test of time then I may well be tempted to swap in the near future, for now though you can have my Gore-tex paclite jacket, when you prise it out of my cold dead hands.... ;)