I know the theory, but I was really badly co-ordinated when I started off yesterday. I was making a loud footfall too, but it's hard/impossible to run on your toes (my preferred technique) at 8min 44sec/mile pace :)
It's hard to articulate this, but when I put my foot down it wasn't where it used to be - or where my brain thought it should be. I'm not sure you can really appreciate what it's like until you've experienced it (which you hopefully won't. Ever.)
I know that the brain does a lot of post-processing (for want of the correct medical term) after runs which should lead to better technique and efficiency in the future. I am therefore now looking at more runs, at very short distance so I can improve my technique - which can't be difficult from where I am at the moment!
Like you, the last thing I want to do is high mileage. In my case until I learn to land well, and not announce my approach from 400m away, the runs are going to be very short.
On the plus side, I've had no ill effects apart from a strained achilles tendon - almost certainly from trying to run on the front of my foot at nearly 9min/mile pace - after a lay off of nearly 4 years.