Thursday is Corrie's weakest day too. If you compare it to a Thursday from say September, that is up from 8m to 14m - no easy feat!
It will be interesting to see the viewing figures from tonight, as there is the ambiguity of Peter Barlow's death still hanging over the storyline. Also, more deaths will be announced. I would imagine that even on Monday the viewing figures will still be up.
It does seem to have had consistently good ratings all week though, and for a 50 year old programme that is pretty good going!