Nah, just tested and mail.google.com took 23.3 seconds to load in Chrome and 30.2 seconds in Firefox. I have a 4-core 8-thread i7 and am on a 20Mbps internet line. It's the website, it isn't my computer.
(To be clear, I'm not excusing how slow their code is, just trying to help you save some time in the long run.)