If you're noticing you're pulling away from a stop with more power, that's low end torque you've opened up, unless you're REALLY putting your foot in it...and it means you're headed in the right direction with a deeper, wider groove.
(I notice the same thing on mine, and I don't feel I'm being particularly aggressive. It's just I seem to pull away from the car behind me faster than I expect without more effort.)
Good Job.
Now that we've talked about the groove, did you do the PCV stuff? how about opening up the spark plug gaps? If you like the improvements so far, you should really try going a bit further...