Any merit to installing the 580 drivers with 200 or 400 cards?

[Highwind]

With the 580 being sold, Nvidia has released new drivers. However, for the first time in quite some time, the 262.99 is only marked as compatible with the 580. No reference to any improvements, on the surface it looks like just a release to work with the 500s.

GEFORCE/ION DRIVER RELEASE 262



Version:
262.99 WHQL
Release Date:
2010.11.09
Operating System:
Windows 7 64-bit, Windows Vista 64-bit
Language:
English (U.S.)
File Size:
128 MB


RELEASE HIGHLIGHTSSUPPORTED PRODUCTSADDITIONAL INFORMATION
This is a WHQL-certified driver for the new GeForce GTX 580 GPU.

Additional Information

Installs HD Audio driver to version 1.1.9.0.
Includes PhysX System Software to version 9.10.0514.
Supports DirectCompute with Windows 7 and GeForce 8-series and later GPUs.
Supports OpenCL 1.0 (Open Computing Language) for all GeForce 8-series and later GPUs.
Supports OpenGL 4.1 for GeForce 400 series and later GPUs.
Supports GPU overclocking and temperature monitoring by installing NVIDIA System Tools software.
Users without US English operating systems can select their language and download the International driver here.

If you search for drivers for geforce 500 series, the 262.99 above is returned.
For 400 and 200 series, the 260.99 is returned.

I'm a little hesitant to do so myself, but has anybody already jumped the gun and installed 262.99 on an older card and can comment?