2000mbps plan turned into 2100?

Hi all! A pretty low impact thing, but did the 2gbps download tier recently switch to being 2.1gbps? I did a speed test on speedtest.xfinity.com and noticed the site said "2100mbps":

So I logged into my account, and sure enough that's what it says there:

Kind of random.... I'm quite certain it used to be 2000, as my old bills list that number. In my experience the total downstream bandwidth in reality has remained the same, with overprovisioning it's usually around 2200-2300mbps, depending on which Speed test site. Just curious about this. Thanks!