Nope. Checking the vendor string to determine capabilities when the CPUID instruction already has flags for different capabilities is unjustifiable. When a CPU claims SSE2 support, the compiler should enable SSE2, regardless of the vendor string. If AMD's implementation of SSE2 is buggy, that's their problem, and Intel should have no trouble making it into a PR win.

This is really no better than printer manufacturers putting chips into their cartridges so that they can use the DMCA to prevent third parties from refilling or making compatible cartridges.