Launching without traction control and just romping the throttle and you'll stand that bitch up and drop off like a wiley coyote move with his acme rocket. Even with traction control you can still do a bit of a bump bump launching as it cuts power to put the wheel back down on the ground. Id assume that will kill your time too. Launching on an Electric bike DOES take a bit of skill, it's not just point and pull as you imply. You'll want it at the threshold of pulling the wheel off but not enough to activate your TC and cut power to it. With a little practice you'll be able to tell when you are getting light in the front end and be able to feather the throttle as you need.
YOU feathering it is precision control, the TC doing it is kill, ramp back up, too much KILL ramp back up. Oh don't forget the flashy blinkey blinks on the dashboard too.
As for the app. Another idea for that data, If one is on the racing circuit, you will be required to have a chrono on your bike, it talks to the track clocks etc and they come with the free app that tells you all the splits etc etc. I think you can buy them outright for like 600 bucks or rent them by the year for like 120 or so. I'll have to dig up the link. But on that, yes it will give you a nice chart / graph at the end of your run with all your data.
ALSO on that, if you have an airbag suit, most of them come with that build into them, you can plug in after your run and download the huge glob of data that thing accumulated on your run and there are programs that will spit out charts and stuff for you. They can tell you speed, lean angle, g force, accelleration / decel, direction, things like that which can be really helpful. If you DO happen to set the airbag off, the I guess you could call it, autopsy of the event, is incredible, you can tell by the inputs, ok here's where the asshole rear ended you, here is where you left the seat of your bike, this is about the point you went about half a somersault and set off the airbags. this little ding here is where your foot hit the handlebar on the way over the bike, this sharp spike here is where you hit the pavement, etc down to the millisecond. Hopefully nobody here ever needs that data, but it can be there when needed. This might also help an insurance claim as well, shut down the bs real fast when they try to play stupid with you. I have seen some companies want you to pay for this data, but i think Dianese is starting to include it with their D-Air systems now, but you'd have to check with them to be sure.
Aaron