A couple of weeks ago I bought some Giro Ambient's. I've always avoided temps below freezing but for this winter I decided to finally get some proper winter gloves and shoes (Lake MXZ176). This morning it was in the 20's so I decided to put them to the test. The weather website said it was 27 degrees but my gps read 22, my water did start to freeze on the ride. So it was cold.
The first couple of miles my fingertips were starting to get a little cold but by mile 4 or so my hands warmed up and were good to go for the rest of the 28 mile ride. My hands actually sweat a little, the inside of the gloves were wet when I got home so I wouldn't even want anything warmer. Giro says they're good from 35-45 degrees but they're good in the 20's.