Why would it be bullshit? There are more 360s than ever.
And the amount of killer titles coming to 360 is less than ever as well, it's drying up fast.
I doubt the subscriber base on 360 is going up. Instead I think it is actually going down because of the transition towards next-gen. The choice of service is not as clear-cut between PS+ and XBL as it was during the PS3/360 generation.
We all know that among next-gen consoles the PS4 is currently the dominant platform, and there's plenty of 360 owners looking for next-gen that are making the transfer to PS+ instead.