He and his agent know exactly what they are doing. He'll need to deliver quick at United, because the players wont tolerate a big time charlie not producing, and neither will SAF. Assuming he goes there.
He'd need to deliver quick at City and Chelsea as well. Spending £35million+ on a failure won't look good for City, especially when they spent £25million on Nasri who has been performing well the last couple of games. And Chelsea would be ridiculed if they spent £35million on another non-performer like Torres had been.