I finally called one of the Slough consortium schools today to find out whether we will be able to check our DC's results online before receiving the post. As expected, came to know that because we applied through Reading and not online with Slough, therefore we do not have the unique online reference number to use to check the results online.
So let's wait for the results to arrive through our doors.
But one good thing came out is that, they are planning to post the letters such that we start receiving from begining of next week. That gives me the indication that as Slough consortium previously said that they will post the letters on 17th, I think they are still going to do that so that we start getting on Monday or latest on Tuesday.
Looks like Slough results will be with us before Reading results.