My FPS is always at 60 (vsync) on both clients but if I undock both chars and then set one to follow and walk around with the other then I also see my second bots movement as "jerky". For example if I drive in a line and then stop then the second bot (the one on follow) will usually look like it's continuing to drive on past me. When I alt tab to the second client then I'm actually exactly where I should be (right beside the bot i'm following).

What happens is basically called "rubber banding" in EVE.

This is not a client performance issue - it' an issue with how the server synchronizes player movement and positions between individual clients/players.

I'm not having any client side performance issues so far.

Cheers
Damian