your not being serious are you?
Do you think the 480s didnt sell as well as the 5870?
http://store.steampowered.com/hwsurvey/videocard/
shows the gtx 400 series more popular than the 5800 series. The survey shows the 480 is over the 5870 and the 470 over the 5850.
steam has many many millions of users and the survey represents the percent of their user base using said GPUs. We know from this that without a doubt a lot of gtx480s are in use on the market. Since so many are still in use then the data suggest that nvidia could have actually sold a larger amount of GTX4XX than AMD had the 58XX. To further support this (and to cover any counter claims of high volume non gaming GPUs such as for Bit mining), we see that the discrete GPU market share for the past few yrs has been dominated by Nvidia GPUs. Quarter to quarter, the majority has been in nvidia's favor. Its been pretty steady nvidia market = 150% of AMDs. Which means for every AMD card sold nvidia sales 1.5 times. This has been pretty stead even through the fermi generation.
The data is strong but may not sway you. you may not agree with the data i present to you. you may not think its proof enough to say nvidia sold specifically more 4XX series cards than the 58XX. This is okay because i only want to prove than nvidia at least sold as many GTX4XX GPUs as AMD did their 58XX series. I think the data goes beyond proving at least that much. Therefor your statement is pretty much bull.
You could say i at least proved that much and possibly more.......