Indeed it is Mike!
I think people do get overly hung-up on food and drink during races. For most people, if you have eaten well and are well hydrated up to 1:45 is easily done with no additional food or drink (unless warm, then drink can be more of a factor). It's not so long ago that there was a plethora of decent club-runners knocking out 2:30 marathons who without even thinking about any need for food or even drink becasue that's just what they were used to (that makes me sound old!)
The trouble with using the massive amount of energy available to even the skinniest runner as fat, is that the majority of people's metabolism just hasn't had enough practice to do this efficiently given our easy access to a wide diet and reliance on carbs, which is why for long runs when the initial glycogen stores are used up we all turn to gels, jelly babies etc etc.
The best way around this is to train your body to burn fat more effciently by running first thing in the morning before breakfast, or as Noakes suggests, on a low carb, high protein diet. It does take time, and can be unpleasant for many people to do this for the period your body takes to adapt - and I'm not convinced everyone can do it. Whilst a lot of Noakes makes sense, personally, I try to compromise by both making sure my glycogen stores are topped up by a reasonably healthy diet (whihc usually means high carbs the day before) then running a medium, and occasional long, run first thing to teach my body to use it's reserves more effectively and alter the balance of how glycogen and fat are metabolised.
For my next marathon this autumn I will slowly increase the length of runs done 'hungry', as I've been convinced this works by other runners. I'm no luddite though, and will use gels on race day, from about mile 15 on as they will then act as a bit of a turbo boost! That said, its worth taking one gel to get used to opening and eating them on the run - just don't turn he wrapper into litter as so many runners seem to do!
For what its worth, even before this strategy, all my marathons were done with no more than 4 gels in the latter part of the race, plus water on the course.
Right, I'm off to hunt for a springbok...