Stro, may i please know what settings you used for these shots?
If you click them, you can get the EXIF info under the 'actions' menu in Flickr.
I was at 2.8f, ISO 100, and 11mm. Shutter was high, and varied depending on each shot. One of the things I love about this lens. I can crank it wide open to keep my shutter speed high. I rarely even have to bother with focusing. Set it to infinity, and forget it.