This is a honest question...
Why is there so much concern over opening weekend and domestic gross?
If it makes money it makes money?
In the current movie marketplace it's a very rare "blockbuster" that has legs for more than a few weeks. In order to make any significant money in first run a movie gnerally has to do a great deal of business in the first week or so.
One wonders if adding Thursday shows to the schedule might not be a Paramount response to some of this tracking data - although I haven't been able to find much info on Marketcast's track record. They seem to do a lot of random polling;
NRG seems to be better known.