Nobody should expect that... the surge will be huge, and they need to spread things out so there aren't 1000+ people trying to run around on each starter planet concurrently.
These worlds consist of a large cluster of very expensive servers each, and they need to make good use of that hardware, spreading player levels over time to help balance that load across all planets on each world (and the whole cluster of servers for that world). If they have 2 million pre-orders and wanted to allow everyone to rush the gates all at once, they'd probably need like 1000 worlds (not 107). Then, post-launch, they'd have massive server mergers once the excitement died down (because once players spread out past the starting planets, each of those worlds would feel too empty).
Even just the Day 1 rush will be huge (although perhaps they'll finish that up by the end of today). Didn't they have like 350K pre-orders on July 21st?
Kudos to them for spreading things out, hopefully keeping the launch smooth. I don't expect to get in until maybe Saturday, but that's OK. My kids won't be joining me until Tuesday .
Khafar