Keep in mind on preorders we have an advantage right now, casuals and a lot of scalpers most likely dont know about this event happening tonight and are not ready to preorder yet.
The flood of info on Switch wont come out until in the morning so they wont start preordering until later. We already know about it cuz we are on forums an video sites all the time.
Now 2nd wave of preorders might be harder to come by, since by that time everybody will be aware of Switch and waiting for them.
Scalpers are fans too you know. Perhaps they're lurking this thread RIGHT NOW.