Slow cursor during screen sharing

Hello,
Running Mavericks on both my 2009 MBP and 2012 2.5 it Mac Mini- I am noticing that the cursor is sluggish- up to the point where I can swirl it around on my trackpad from my MBP- and the controlled Mac Mini lags behind up to 20 seconds.  I have not seen this prior to Mavericks so I am guessing it is a bug (even running a fan control app to see if cooling the Mac Mini which is mounted in a gator rack case but with ample circulation is causing the issues).
I am wondering if anyone else has experienced this.  I am running an external Thunderboth to VGA display (and have even tried connecting via HDMI).  Normally I use the hdmi headless dongle for live music use and don't notice the issue (but am not using the trackpad much as I have MainStage controlled via my controller).
Any other suggestions

Only the screen content is being shared during screen sharing. Audio sharing is currently not part of the functionality.
What's a use case you can see for transferring audio as well?
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