I've actually had the opposite experience recently, but it was a page I developed myself using FF as my primary browser, and when I switched to Chrome discovere

I've actually had the opposite experience recently, but it was a page I developed myself using FF as my primary browser, and when I switched to Chrome discovered it was very slow (>10s vs. <1s in FF). I expect it depends mostly on what the developer is targeting. As Chrome approaches monoculture status similar to IE in the 90's, devs are more and more paying attention only to it.