He also tracks that time from 3.1 to 3.1.2, and says he's found data that confirms his previous theory: that it was more than the tooltip that needed changing during the last patch. Before the patch, he was looking at 11% uptime during three Ulduar fights, and after the patch, that's dropped down to 6%. Blizzard said they were only changing the tooltip, but that doesn't seem to be the case.
Finally, he stands by a notion that a lot of our commenters debated last time: that LnL is proccing more after 3.1, even though the mechanics claim that it shouldn't be. I haven't had a lot of personal playtime with it post-patch, but there are two different conclusions to take away here. First: LnL, in conjunction with Black Arrow and Resourcefulness, is a definite force for DPS in the Survival spec no matter how often it's proccing. And second: there still may be something else going on here behind the scenes -- the removal of the cooldown is almost definitely a factor, and Blizzard may be playing around with the RNG more than they're letting on.