I have run a VCarve Pro file with lots of small segments and it is very smooth. Originally it struggled with G00 and G01 with a delay between them (same on PP but a shorter delay).
Art has fixed the delays in but systems in Mach3 2.62
The video at
http://www.castlewoodconsultants.com/Misc/PulseEngineCompare1.wmvshows the code on PP and SS with and without the delay. It is streaming but being full motion at 24 frames per second so you can judge the motion takes a whlle to download - whole thing is 512 Megabyte. You need sound to hear the machine in action.
I have since doubled speeds but not yet videoed it.
John Prentice