Ummm...maybe it's just me, but those seem like huge sales numbers for just one month. I mean, xbox sold approximately 140K in Jan in the US. One has to assume that those make up the majority of their worldwide sales, as well. 500K just seems way too high. If they pulle that off, it would be an enormous success.
And there is no way Sony is going to sell close to 1 million units in March alone.
Why not? I agree 500k would be an enormous success for XB1, but 1m worldwide for PS4 in a month is about what would be expected given their production, the only reason it has been lower in Jan and Feb is due to air freighting units during december cutting down 2014's supply, even so they sold 1.8m in 2 months.