According to this thread:
  http://forums.java.net/jive/thread.jspa?threadID=41748&tstart=0
The new AA shader is much slower on NVidia NVS285 hardware
(which reports as supporting PS3.0).

From the thread:
  The program below runs at about 800 fps with b14 and about 200 fps with b24 on my computer. Dell 380, 3Ghz Pentium D, Nvidia NVS 285, XP Pro SP3.
  I tried disabling direct draw on b24 and it was about 10 percent faster than with it enabled.

 OS Version = OS_WINXP Pro
CheckAdaptersInfo
------------------
Adapter Ordinal : 0
Adapter Handle : 0x10001
Description : NVIDIA Quadro NVS 285
GDI Name, Driver : \\.\DISPLAY1, nv4_disp.dll
Vendor Id : 0x10de
Device Id : 0x0165
SubSys Id : 0x29d10de
Driver Version : 6.14.11.7551
GUID : {D7B71E3E-4225-11CF-116E-962200C2CB35}
D3DPPLM::CheckDeviceCaps: adapter 0: Passed
------------------
D3DGD_getDeviceCapsNative
D3DContext::InitContext device 0
D3DContext::ConfigureContext device 0
[V] dwBehaviorFlags=D3DCREATE_FPU_PRESERVE|D3DCREATE_HARDWARE_VERTEXPROCESSING
D3DContext::ConfigureContext: successfully created device: 0
D3DContext::InitDevice: device 0
D3DContext::InitDefice: successfully initialized device 0
[V] | CAPS_DEVICE_OK
[V] | CAPS_RT_PLAIN_ALPHA
[V] | CAPS_RT_TEXTURE_ALPHA
[V] | CAPS_RT_TEXTURE_OPAQUE
[V] | CAPS_LCD_SHADER | CAPS_BIOP_SHADER | CAPS_PS20
[V] | CAPS_AA_SHADER
[V] | CAPS_PS30
[V] | CAPS_MULTITEXTURE
[V] | CAPS_TEXNONPOW2
[V] | CAPS_TEXNONSQUARE

The benchmark is attached.