20 hours per day faster. Sorta. The slowest part of downloading most web pages is the images. Although PainScience.com [formerly SaveYourself.ca, at the time of the change] pages are already fast (under one second for most visitors), a good chunk of that time is images.
From the Dept. of Long Overdue Chores: hundreds of images on PainScience.com have now been replaced with lighter, aggressively web-optimized versions that download about 20% faster on average. It doesn’t sound like a lot, but with about 18,000 page visitors per day, it definitely adds up. In fact, it will save (very roughly, lots of variables) about twenty hours of data downloading time for my visitors every single day. With more and more people on cellular data plans, that actually matters!