Google Chrome Consumes More Memory ?

Just a simple test out of boredom.

All browsers were launched with a blank page and then navigated to Google home page. At this point, Chrome consumes the least memory of the three.

However, when opened up more tabs (Google, Yahoo and MSN), Chrome actually takes up more memory.

Google Chrome uses multi-processes instead of multi-threads for its tabs in order to prevent events such as a tab crashes whole browser (which is also the behavior of IE 8), which would be the most likely explanation for the test result.