It doesn't run at a few thousand FPS, but it does run fairly constant at about a monitor sync'd rate even with a fairly complex scene. *shrug* (ie, plenty fast for something like an editor.)
With Caspian's trick, a jME that also supported JOGL could potentially make this much faster.

Is this via PBuffers?
PBuffers is horribly broken on my Mobility Radeon 9000.
(Yes I code on a laptop!

)
The latest drivers support OpenGL 1.3 and says it has
PBuffers, but all the demos that use it crashes, not just
JOGL ones, so I'm pretty sure it's a driver issue.