There is no doubt that the crowds will be larger than what comes for the first class games and probably more than some test matches on weekdays.
The point is whether there will be enough interest amongst the public and sponsors to make it a profitable venture for the Franchisees.
DLF and Reliance are extremely big and after putting in their returns on their own exposure to the public they may not worry much about losing money but others will need a solid bottom line to sustain their interest. Vijay Mallaya has a penchant for spectacle and will spend lots of money just for the glamour.
PreityZinta may be stupid but her boyfriend and industrialist Nesse Wadia isn't so he will be looking at the numbers very closely. The Deccan Chronicle will be even more conservative.
All this talk about being in it for a the long run is purely derived from the sales talk of Mr Lalit Mody. Whether it will actually be a paying proposition is not such a certainty - it may and yet again it may not.
This is a high risk venture but most will have fixed an upper limit to how much they will put in and for how long before they start tightening the purse strings and look for cutting down the losses.
There was a very interesting article in the Hindu (It was also refered to in the cricinfo article I just posted).
This makes very interesting reading.