Those are CPU-intensive tests, right? I don't think the clock speed was changed (the results certainly don't suggest that). However subjectively we're seeing apps open a bit faster, system animations seem a bit quicker, eInk page switches are a bit faster, etc. I suspect some of the software was optimized and/or improved. It's like people waiting at websites - if it takes more than a couple of seconds, most people will try another website. A couple of seconds is not a long time (not like a minute), but it's enough for people to grow impatient at.

Meanwhile, I recently did a "closed eDGe" battery test. Previously, when the eDGe is closed (suspended), battery life was about 24 hours. Now, after 13 hours, I still had 62% battery, which projects to 30-36 hours when suspended.