Thanks for posting to ask! Unfortunately, what you’re seeing in Mac vs. Windows performance is expected, which is why we warn about it on our product listings.
The USB 3.0 generation products won’t make much of a difference as one might expect, because the bottleneck is less with the USB bus, and more with how the Mac’s graphics subsystem works and how external graphics devices like this hook into it. For the current architecture, the CPU is the main bottleneck.
There will be some performance gains in DisplayLink’s newer Mac drivers (which are now in “alpha release” stage, available at http://displaylink.org/forum/forumdis… )
But generally, they won’t be a “huge leap” and I don’t think DisplayLink will be able to raise the performance to the same level as Windows. I know that’s disappointing to Mac users.
What it would take for the “huge leap” is if Apple did something like what the guys in the Linux world have done: have clean interfaces for one hardware device to render pixels that another device may display (the new DRM PRIME support in Linux http://www.phoronix.com/scan.php?page…).
So far, I don’t think Apple has expressed any plans in that direction, although it would be a great way to go in a multiple-display world.
I know it’s frustrating for anyone who has seen the Windows performance on similar hardware, when moving to Mac. Sorry I don’t have better news!