You're right. It's a closed Beta at this point, so feel free to drop your email, and we'll open a user for you. Soon we'll release an open beta where everyone can sign up and start using.
Reg the demo, there might be a chance that in the demo, you got the response from a location that is close to you but not the closest. The product version is well-optimized. I hope it helps.
And the demo doesn't work properly, I'm in Sweden, it connects me to the Netherlands instead of Stockholm which is closer to me and has lower latency