Can I have your stuff?

I have been frustrated with the responsiveness also. Another thing I have noticed on my toon (bounty hunter - merc) is that sometimes I'll spam a spell as the last gcd is ending, and it appears that I get two gcds; the first one is about a 1/4 of a second gcd and then the normal gcd occurs. I've even noticed the shading on the quickbar flashes when this happens. gcd ends i spam an ability gcd starts gcd ends 1/4 of a second later gcd starts again gcd completes as normal