It still automatically lowers at around 97.5mph. Definitely @ 100mph. I do this every single morning. Once it's lowered, it will stay lowered unless you fall below 65mph at which it'll go back to standard height.
Thanks Tesla for making me break the law every day to activate the feature that I paid for. If I get a ticket I'll be sure to send it via certified priority mail over to you to pay it. I'll send you the bill for my insurance rate increase too while I'm at it.
Oh please, you take the turnpike every day if you go under 100mph you will get run off the road!