Hello,
I own a Haswell i5 NUC (bulk version) and have two problems when using it with Ubuntu 13.10:
1. the turbo mode (up to 2.6GHz) is not working (enabled in BIOS)
2. if I chose shut-down if turns off and starts automatically againbo
edit: the whole N/A - Geekbench Browser run without turbo at only 1.3GHz :\