I guess I'll post the posts here then.
Shiggy@NeoGaf:
I heard from pretty a credible source that there was a demonstration, which allowed the use of two Wii U pads simultaneously, at Nintendo last fall. That source can be considered trustworthy; I had not believed it before that either.
Chris1964@NeoGaf:
There wasn't a demostration with two Wii U pads simultaneously.
The info was at documents NoE's representatives and distributors got at the meeting last August.
But the demonstration indeed had wireless controllers.
Shiggy@NeoGaf:
Thanks for clarifaction! It's been a long time, please forgive me

Chris1964@NeoGaf:
I double-checked to be sure.
"So far we know for sure that can be simultaneously connected 4 Wii Remote Plus, or at least 2 WiiU controllers (but not learned if they can be linked together, ie 4 Wii Remote Plus and 2 WiiU controllers at the same time)."
"We played wireless, so yes, it had battery inside."
They weren't shown to be simultaneously working with the same Demo, just two uPads were shown at the same time.And Nintendo said they would have two per system.
Edited by Nollog, 19 May 2012 - 03:29 PM.