Edit #2: many people are saying it's not fair because the 3ds is in its first year. But this is its best year ever in the USA so far. So this fact makes the achievement by the ps4 unbelievably amazing.
This has spawned a couple of response threads, one of them gave us this little gem of information.
3DS sales after the first two months of each year. People going to stop using the "it's in it's 5th year" excuse now?
Edit: This is basically me in this thread.
If the NPD leaks are true the PS4 deserves massive credit considering the N3DS released.