This is interesting. Most of 'the books' suggest a focus on quality but I would agree that, for me and my limited experience, I ran better and had better results when I had a higher mileage and didn't worry about taking rest days, rep sessions etc. Difficult to judge when each run and race is so different, and I suspect that in my case this is pyschological: 'quality' sessions feel more like serious hard work and make running seem more like a chore than a joy.
Only been racing since last November but my best results have all been on the back of longer but more leisurely runs, and when I am enjoying myself. My worst results have come when the race felt like a 'quality' session: a chore not a joy.
Not a very scientific approach and I'm sure quality sessions work wonders for others. This could actually just mean I'm lazy and hate hard work...
Glad it's working for you Stolly