Two words: Glass Floor.
Do it. Join with all the kids and start jumping up and down until you realize it might break. But no... it won't. I saw a pretty heavy set man jump a few times and it was still all good.
I don't know about the 2 hour wait since I was accompanied by the events director. It's definitely a great place to host a corporate event as it is one of Toronto's biggest attractions. A bit pricey, but still a unique place to woo some clients.