So I heard back from a couple of people I contacted yesterday about their sales and stock. Both wish their chains to remain anonymous, but both are quite large.
They are now back in stock, but again, they say that both 360 and PS3 have higher sales than Wii U, and they have had more inquiries for PS3 12GB+Book of Spells than for Wii U (probably reflecting Sony's massive advertising push) but again, they don't have much stock for that bundle either. He says all the manufacturers need to get their arses in gear. The ~ £150 12GB PS3 is their pick for top dog this year, and Vita is their pick for worst in class.
Their pick for top sales is the £150 12GB PS3 as well and they also expect Vita to be worst seller.
I am still waiting on one more contact to reply, I think he will be less gloomy than these two.
Essentially he said a few locations are going to be doing questionnaires with PS3 12GB and Xbox 4GB buyers as to why they purchased those systems over a Wii U and asking Wii U purchasers why they bought a Wii U over a PS3/360.