Don't know 'bout gorgonzola (never my favourite), but for some American blues, it should be, and I know the 'Roquefort tax' has been seeing me purchase more Maytag Blue and other homeland hits.
I tend to take Maytag for granted as I live in Iowa, but for my money, the Rogue Creamery Blues are the best american-made blue cheeses. One of the best steaks I've ever cooked myself was a strip steak with a little melted Rogue smokey blue. My 5 year old son, who is crazy about blue cheeses, has a slight preference for the Rogue smokey blue over his second choice the Bayley-Hazen Blue.
I do put St. Augur with my favorites. I haven't had much real Roquefort.
Cheers,
Kevin
edited to (spell correctly) and avoid confusion with Belgian Trappist Ales