Carbs don't get any more complicated than the number of saccharide molecules they're made up from. Glucose, fructose, sucrose, maltose are all single molecule sugars and therefore very easy and quick for the gut to absorb; that's the whole issue about Glycaemic index - the speed at which something can be absorbed means it hits your blood stream quicker but then leaves your blood stream quicker and is converted to fat. Lower GI carb sources are either disaccharides (2 saccharides), oligosoccharides (3-6 ) or polysaccharides (greater than 7 saccharides) which are progressively more complex in structure and need to take time to break down.
This diet doesn't make much sense where honey is used - you could do the same with Haribo, Wine gums, Fruit - anything that's made up of simple sugars. in fact, nutritionists would likely all advise not going to bed hungry as they are correct that sleep can be quite energy-intensive. Honey is seen as healthy but its no more natural than sugar cane - it doesn't get refined to within an inch of its life though and with all foods, the real evil is in the refining processes.
As for Chris hoy endorsing it - it means he's heard it and doesn't disagree. I doubt anyone can remember the last time he needed to lose bodyfat (and I mean properly lose bodyfat, not the marginal pre-season toning that goes on in pro sports) so I can't see him having leant on the diet enough to swear by it without a payment being made somewhere along the line. He will have been coached and advised on nutrition in far too much depth to start being able to nail 'those 2 teaspoonfuls of sugar before bed' being the clincher to save the world's fattening population.
Manuka Honey has an extract called Propolis I think which has supposedly been isolated as being the thing able to bolster your immune system but I think it's just another claim with insufficient science to back-up. Doesn't make it BS, there just isn't a reliable quantity of data to draw meaningful reliable scientific conclusions. Certainly not enough to justify the price tag. BUT - people will go with what they believe and live and let live on that one.
Key take-aways from this:
1. Carbs are not inherently evil; we all need carbs for bodily functions to work properly and starving ourselves of that is not the way to live healthily (but that justifies brown rice/wholemeal pasta, not chip shops chips).
2. Sports recovery fuel is stated as a ratio of 4:1 carbs to protein i.e. for every gram of protein, you should be taking 4g of carbs. They both give approximately 4 calories per gram, so a classic after a workout would be 25 grams of protein, 100g of carbs, giving you 500 calories. Baked beans on brown toast is meant to be pretty good (don't give me that 'full of sugar' nonsense, that's part of the point)
3. Go for food with the least additives and processing if possible -
4. The saccharide complexity is key as is timing - doing a workout, get simple sugars in. I've done plenty of rides with a bag of jelly babies in the jersey pocket - couple of those every 5/10 mins is fine.
5. Celebrity endorsements are worth the bung, not the paper they're printed on.