Chrome is indeed big, however calling them slow is incorrect.
In fact there are articles of people burning out with the release process of Chrome, left behind by the sheer speed at which the project is moving forward.
This is so true. There were tens of Chromium based browsers which had a good niche market interests but eventually failed to keep up with Chromium's super fast development pace. I'm pretty sure that the Edge team spends lots of their eng time solely on rebasing and one of the key factor for a successful Chromium based-browser project is to manage clean separation of your domain code and Chromium codebase. Otherwise, your team member will be quickly burnt out and leave the team.
You're right. I meant to say big projects tend to be conservative with adopting new technologies. I didn't mean to imply anything about development pace.