all it means is that your legs are currently fit enough for the demands you are currently placing on them.
13:46 /mile for 2.46 miles is not exactly going at it "hammer and tongs"
I imagine of you dropped your pace to 10 minute miles or went out and ran 5 miles tommorrow at your current pace---- you would be able to enjoy some soreness :>)
Let me give you some encouragement.
you are probably going to sail through the C25K program with no problem.
I did the same program starting early Oct. of '09. I had had a knee operated on several years prior-so I babied myself and took it easy through the C25K program and really had no soreness to speak of( like you I had an active lifestyle going into the C25k via miles of dog walking each day and a physically demanding construction occupation)
following the C25K program- I began to extend my mileage out-and I would say that once I got over 4 miles on my runs I got to enjoy "soreness" on a regular basis.
I went on to run a half marathon in oct. '10-almost exactly one year from starting the C25k- so I will say that I was "sore" to some degree for about 10 straight months.
I took a few weeks off after the half marathon-and now I am back to running 4 miles every other day- no soreness.
In all fairness- the C25K program is a FANTASTIC plan- but it isn't a transformative experience.- it gets you to the point where you can then begin to effectively train for a transformative experience- but the c25k is just the very,VERY beginning.
enjoy the ride- you have PLENTY of time to get to where you want to go.
Best wishes,
stephen