Somewhat misleading here though, the PS2 had what appears to be a slower start, but that's because it was available only in Japan until 8 months in. It was a staggered launch. 

The PS2 sold more than the PS4 + XB1 combined in its second May in the US market (520k+). 

PS4 DOMINATION!!!

You never stop it...

Ok guys, update with all information!

So, everything besides the One is down, and by quite a bit at that. This is a good development for the One, The Witcher 3 was a bigger title for the PS4 as the software sales clearly show and there is no other, proper reason for it to have increased other than the market opening up more to it.
I said last winter that MS would have to remove Kinect and that this would help them a lot, that looks like a pretty solid statement at this point.
Decent opening for Splatoon, lower than Japan as expected, the game costs a lot more in the US and the overall design was bound to have more appeal in Japan, still; a good debut here as well (and pretty good in Europe to boot).

I think this summer will be terrible for all parties involved; things can get even worse from here on out and the release schedule isn't exactly jam packed with greatness (pun partly intended). And, no, just like every year, E3 announcements will not help hardware sales, it just simply never has (but it has hurt them).

PS4 VS PS2 VS PS3

PS2: 514,000
PS3: 208,000
PS4: 152,000

WOW. Looks like the thing can change... 25% less than PS3 and 70% less than PS2... and next month Batman bundle will not change the trend, considering PS3 was over 400k and PS2 nearly 700k.

WU VS Wii VS GC

Wii: 290,000
GC: 78,000
WU: 43,000

Well... depressing for sure, but at least is not terrible like some month.

This is exactly why I told everyone to calm down when the PS4 launched and they started rambling on about selling 20 million in its first year. I maintained that I wasn't even sure that it would sell 20 million in one CY for its lifecycle (it's still possible though).

Looks like Sony will have to actually do something to maintain momentum this year and next, let's remember that the PS4 launched at 200$ less than the PS3 and had competition a lot less fierce (the PS3's main competitor had a one year head start and the Wii was breaking records right and left at the time).

Funny fact... PS4 outsell XBO by 13k this month...

yes, that was what I pointed out. When the sales are good ms just go direct about it, but 12-14 out of 19 times this gen they covered with spin (at least this one isn't mind blogging).

If last year may had been at least decent or similar to April I wouldn't say anything about it being a spin (regardless of gap from ps4). But use 81% growth was used to give a false sentation of incredible growth when in fact it was just an ordinary month with weak numbers (probably to everyone), the growth just seems fabulous because they sabotaged may 2014 immensively with dekinected.

Have I said they can't or shouldn't? Nope, just called a spade a spade. Not sure why so many disagrees.

Sony winning or losing NPD just give breafy "thanks for month lead" or "thanks for cummulative lead". Nintendo Just comment their numbers with highlights the important parts. But don't say all months 3DS won against Vita. Every company spin, but only ms have obsession with spinning to look like they won.