I saw him use the terms we and us during the speech. He looked like he was reading an agreed statement that didn't put him into a position that had to technically lie but did enough to keep him MPs on side.I think Corbyn's played it quite well, actually. He's put forward a different case for remain, rubbished the apocalyptic nonsense Cameron & co have been pushing, and refused to share a platform with them. His speech yesterday was very good.
I think the whole reform argument is just so he can later go back to being against it after he declares it as un-reformable. I don't know if Owen Jones is aware of the strategy but I suspect he is being used.
If you think it can be reformed then watch this. The important bit is at 55 mins in.