Hi Dan,
Sounds like the same thing we are getting - it is especially noticeable when moving Windows around.
We are running HP G8's on View 5.3, Win 7 SP1. I previously thought it may have been a storage issue, but we are now running all our linked clones (and replicas) off HP Storage IO accelerators, which have something stupid like 500,000 IOPs.
I found that in our case, if we create a full clone and a linked clone off the exact same template (and same snapshot), the linked clone will perform poorly with regards to visuals, and the full clone works wonderfully. This is why I suspect it is not a configuration thing, or any issue with agent/tools etc. Our full clones and linked clones also have the same PCoIP variables applied to them.
I previously raised a req with VMware, who essentially said something along the lines of "that's just how linked clones work...".
If you find anything that assists with improving the visual performance, please post back here. I'd love to improve the experience for our end users.
Thanks,
Rorus.
EDIT: Missed a word.