what the chances of success guys - i mean pre ordering and having it delivered on the 14th
If you order within a few hours of it being released, high chances.
It's the same IP4 design, so they're not going to have any manufacturing issues from that side of things so they should have plenty in stock.
Also, i may be wrong but there is probably less demand for the 4S than the 4. Though it is releasing in more countries on more carriers which may balance it out, or even make it sell quicker than the IP4.