I've taken a gander at EJ (Well, really only the last couple pages of the Survival Hunter Thread. It's quite long, and not fully relevant all the time.) and I haven't found any mention of this bug/thing.
Anyways, I was noticing that just relying on Serpent Sting in a raid to proc LnL seemed to not proc as "often" as it should. Seeing as how a non-glyphed Serpent Sting should (in theory) proc LnL once every 30 seconds, in a five minute fight you *should* end up with 8-10 procs. However, I've noticed the number being more 4-6.
This was all anecdotal, until I finally took the time to test it today. I've only one WWS report, but the issues seem clear: (I'll be doing further testing on this later, IE: getting more WWS reports) Serpent Sting does not seem to have a 10% proc rate for LnL.
http://wowwebstats.com/v2ia2narg26v1?a=Gxb05d6c#abilities
Methods: I stood at a Heroic Test Dummy, in full PvE gear (hit capped) and did nothing but autoshot (To keep me in combat) and re-apply Serpent Sting as needed. All of this was recorded via WWS. I *did* have the Glyph of Serpent Sting on and did NOT have Imp Serpent Sting.
At the end, I had a 12 minute, 30 second parse. Assuming one proc per 30 seconds, that should've come out to roughly 25 procs. Taking into account errors in timing/whatever, At the very least I should've come out with 20.
I had 234 ticks of Serpent Sting, which should have averaged out to around 23.4 procs of LnL (Assuming the 10% tooltip is correct). In actuality, I had 13 procs of LnL.
So what does this mean? It could mean one of many things. First off, there is an issue with the Glyph of Serpent Sting. For example, the Glyph of Serpent Sting adds 40% more Serpent Sting *ticks.* IE: Without the Serpent Sting it ticks 5 times, with it ticks 7. If I subtract 40% of 234, I get around 140. 10% of that is 14, which is a lot closer to the numbers I got.
Another explanation could be that Serpent Sting does NOT have a 10% proc rate on LnL. If we were to go by the old proc rate of Serpent Sting (6%) we would average out 14 procs also.
These two factors are exclusive (IE: It cannot be both at the same time).
Anyone please feel free to correct my math.
When you take all this into account, it just means that Trap Dancing is still THE most effective method of DPS. (Especially that there's a bug with the Frost Trap)