What chrome sold was speed. Most of their ads were all about how fast websites would open. And tabs was cherry on top. I know that’s what made me jump from IE. I remember I have a Sony vaio desktop then and IE would weigh it down to a crawl, then I install chrome and that just made me swear to never use IE again.
I remember switching to Chrome just because of the minimalist UI.
I don't know if Chrome was faster at that time, but it felt faster and leaner than anything else. I switched back to Firefox when I realized that there were everal extensions I didn't want to part with. And then back to Chrome again after a few years when Firefox upgraded their UI to make everything bigger and bulbous.