Average generation time (as a multiple of the expected number of shares, IE lower is better)
Jan 04-10: 1.13
Dec 14 - 20: 1.06
Nov 30 - Dec 06: 0.91
Nov 23 - 29: 1.00
Nov 16 - 22: 0.78

Unfortunately OoC doesn't have any stats for the 2 Christmas weeks (slacker!), but my quick calculation shows generation time for those weeks were 0.96 and 1.01. Slush's luck over the last couple months is just a bit better than neutral.