In character, I accept that they aren't going all out against Spiderman. He'd be given some moments to bounce around, but I can't imagine it goes on for very long.
Depending on how you view the CIS vs full capacity issue, the exact length of time could vary though. Storm is likely the main discussion point, as she has quick ways to end this even in character.
Regardless of how you view things storm could end it quick and gentle with some wind. It really depends on the mind set of the x-men here. If we assume they are forced to take him down quick they would do so. Especially in a standard forum setting where spidery doesn’t have any environment to assist. Put him in a construction site or something and maybe he could prolong it a little bit.