The clothes make the run

Sometimes a good run can sneak up on you. At the start of my run today I wasn't feeling into it - the first 5 minutes or so I was running my normal pace but I felt slow. After another 5 minutes the kinks were working out and I was doing better. Then all of the sudden I was running a sub-10-minute mile. I realize that doesn't sound very impressive but that's fast for me. And I kept it up for the rest of the run - just over 4 miles. Not sure what happened but it was pretty cool. It's got to be the new running clothes, right?