"Maybe I've missed it somewhere but one thing I've been wondering now that all the dust has settled is why hasn't anyone noted or proclaimed yet that an IC powered model WON IT ALL! "
From my perspective (having watched all 15 of the top 5 final flights) the reason that no one has said that "IC won it all" is that it wasn't about IC vs Electric. It was about who consistently flew the best patterns. As Brett said above, Dave was relentless in his discipline and made very few mistakes. Certainly, his equipment was working very well, his plane tracked like it was on rails, but it was more a battle of pilots than it was equipment.
At least that is the way I saw it.
Regards,