From NeoGaf:
"Cumulative PS4 & Xbox One sales are now almost 80 percent higher than the combined total of PS3 and Xbox 360 sales after 13 months..." -NPD
"Using 75% as the minimum increase and 80% as the maximum.
PS4 + Xbox One ranges from 1.79 million to 2.09 million."
Also if we know he highest NPD for Xbox One we can determine that the 10k difference seems legit. They basically tied and the Xbox One is hella overtracked. So if Xbox One is 960k and PS4 = 950k then total is 1.9 million for both, which is inline with NPD report statement. Xbox One is at least 400k overtracked on chartz.
PS4 still maintains 1 million + lead.
Edit. This may be the single greatest overtrack I have ever seen. Also, there is a chance that the PS4 is overtracked as well. When you consider that the Wii U is also overtraked, this has to be the worst estimated month ever... but to be honest I think ioi did the best with what he had.
