As someone else already stated, when you break the side or rear windows, they shatter and all the glass comes out. With the exception of aftermarket tinted windows, which wouldn't really makes much difference. Even though the glass would be held together by the tint after shattering, it would still be relatively easy to push out of the way.

The rear and side windows are tempered safety glass, unlike the front windshield which is laminated from 2 sheets of glass with plastic in the middle.

If my vehicle were filling with water, I'd be getting out of the seatbelt, unbuckling everyone else, and preparing to open a door once the pressure equalized. Of course, if I were in my personal vehicle I could just slice the soft top open with my knife anyway.