For CFX/SLI certainly not---but AMD has shown some encouraging signs lately with more frequent driver "hotfixes" than they had been. For single cards, AMD's slow driver releases are generally less of an issue due to most new games working OK with older drivers, except those with Tesselation saturating libraries like Gameworks titles that need to be optimized by the driver team. But in terms of base stability with single cards, yes, I would agree AMD and Nvidia are on par there.
Still no fix for CFX in Fallout 4 though. I'm beginning to think they just gave up on the CFX profile---in the latest hotfix (yesterday?) the drivers default to single card for FO4 on my 2 290x install, and there isnt a manual FO4 profile in the list (although there apparently never was, even when CFX was "working" in previous driver releases).