jcs16 said:
I am not saying they're "faking" it. It's just I am wondering why is it their are brands that are tested earlier than others. Is it because nikon sees a marketing importance if dxo would release a data suggesting that the sensor in their camera is superior or canon, pentax or any other brand sees no importance in dxo data that they are not keen in sending their cameras to be tested. Because for what I know you would always see theses arguments with regards to dxo in photography forums. I know dxo mark is dependent on manufacturers to lend them their cameras to be tested but I think only nikon is the one making the most out of this publicity.
I think you answered your own question. Canon is not in a hurry to lend them their cameras, because they don't see it as a good marketing opportunity. How could they? Nikon's been pulling away for the past 3 years in sensor technology (some their own, like the D3S, d3200) some borrowed and tweaked (Sony mostly). Looks like their sensor strategy works rather well.
They chose not to invest in sensor manufacturing at the dawn of the digital era. Perhaps they didn't have the capital (much smaller company than Canon) or perhaps they thought it's too risky. They did, however, put a lot of money into sensor design R&D. Manufacturing capacity is there, at least 4-5 Japanese companies (Panasonic, Sony, and other names I can't recall). They have developed a number of sensors over the years (d3s being probably the most successful) but they also stayed open to new developments in the market. I think they had a partnership with Sony as far back as the d2x.
In theory, Canon could do the same - I don't think Nikon's deal with Sony is exclusive. The d800 maybe - they might be cross-licensing patents, for example, but it's probably only for a limited term. I wouldn't be surprised if some of the latest Sony improvements in low light performance were due to some IP exchange deal, but we'll never know. But imagine the built, ergonomics and performance of the 5D Mark III with the d600 sensor. That would be the camera!