It's not semi-true, it is true and I can't see how you would know what options he would like available in the future.
I repeat, it is semi-true.http://www.tomshardware.com/reviews/radeon-hd-6950-1gb-benchmark,3041.html
Feutured article. Read it. "The reference card (HD6950) runs out of steam before using the 2GB available."
There are exceptions, for example compiling very large batches of 3D flouting point data (arcGIS would use it for example), but very few people would use it.