Upload & Sell: On
I just tried with my FoCal 1.8 and both my 1DX and my 5D3 report the correct number. The 1DX is showing 41,284 and its status display shows <42,000, so that's correct. My 5D3 is listed as 43,450, which I can confirm to be within 100 of being correct (thanks to my slightly OCD bookkeeping efforts )
So I guess yes, FoCal can get it, because it's talking directly to the camera. I can also say that all file-based tools that I have seen have been reporting all over the place for me in the past, so I would not trust them at all.