Remember when "u" wasn't a word the first time you received a grammar infraction? Well guess what. It still isn't.
After trying both sides (ele/resto) of the same coin (enhancement), i realised some things.
1. Faster shocks are not so important as in both situations (6sec shocks/5sec shocks) you still fit 2 shocks between one stormstrike cooldown. I read this thread in order to see if there is a cycle of SS ES FS that proves me wrong but unfortunately i didn't see something clear.
2. When you are in doubt of totem range you always redrop your totems so that you are certain your group has 100% all the enhancement totems needed. Afterall you are a melee buffer and that is your main priority. So i started playing without 30yard totem talent as when in doubt of 20 or 30yards i reput the totems in the center of my group position.
3. Nature's guidance is important more than 3% hit on white attacks. The difference in glancing hits is significant (i think it affects it alot right?). Also, it is really annoying to see stormstrike and windfury miss!!! at hyjal trash (banshees) when you get the miss debuff and the mages are too far to decurse you fast . Small detail but still :P. Having tried both specs, ele spec misses at stormstrike/wf too if u get this debuff!
My current spec is 3/45/13 and i am quite satisfied as shock rotation still waits for the Stormstrike CD and still just 2 shocks fit in between one stormstrike CD. Maximising your dps by 10 or 20 or 30dps won't really give you a better spot in raid meters, you will always be behind combat sword rogues with similar level in gear.