I'm pretty positive you get about 15 points when you get a personal best.
I'm currently at 8.33 seconds, but I'm sure there's some math freak that can make that look like child's play. It'll give you a different sound when it happens, but I'm getting used to the new sounds, so it's gonna take me a bit to be able to identify the regular noise to the "personal best set" noise in order to describe them.
On another note, I'm wondering if there's a way to cheat the system so you can get a boatload of points. Presumably the dev's set some kind of limit to the timer, but I'd be curious to find out what the cap might be. They might also just have the server kick you out of the menu in a later update, so I don't expect it to be a thing for very long.
Anyway, I'm thinking one could wait for some really long period of time, maybe a full minute, maybe something WAY more ridiculous, like an hour - either way, they could slowly work their way up, gradually getting faster and faster the more they complete the servers. It'd mean a LOT of cash, if you do it right.