Home consoles are ALWAYS supply constrained at launch and post mediocre sales. It's like a curse or something: Either supply is way lower than promised or the console gets pushed back. It happened to the 360, the PS3, the Wii, the PSP (in Europe at least - I didn't see one in store for weeks after launch), even the Dreamcast sold out! The PS2 was probably the only console that wasn't seriously supply constrained (as far as I remember) because retailers and Sony anticipated huge demand and Sony had no problems shipping an ultra huge amount of units (700k+ in Japan first week). And the PS3's European launch was pretty smooth as well - because it had launched months earlier in the rest of the world and Sony shipped more than 600k units.
tl;dr: If a console wasn't pushed back in your territory or expected to totally break all sales record (i.e. not the PS2...) expect it to be supply constrained. Also, expect posters all over the world to doom the console. See you late 2013 for a copy and paste of this post 







