you know, the internet is great, but it's no substitute for professonal medical care...and even the WebMD site (which is the only one I'd even bring to my vet for review) says:
"Young cats need more frequent feeding,” Bough says, “But as they get older, they can go to twice-a-day feeding.”
Larsen agrees that it’s fine for young kittens to “free feed,” by making unlimited kitten food available to them all day long, and then to transition to meal eating around four to six months of age. Free-choice feeding has the additional benefit of reducing stomach distention resulting from rapid meal eating. It also helps underweight or slow-growing kittens. Of course, it’s not the best option for overweight or obese kittens. For these kittens, measured portions offered as meals or until gone is a better choice. Check packages for suggested amounts. Even with the energy needs of kittens, overfeeding can become a big problem.
“Especially control intake around the time of spaying and neutering, which increases the risk for obesity,” Larsen says. “Preventing obesity is preferable to addressing it once it’s already occurred.”
Again, IMO, when you're talking about a kitten and thinking of making a big switch in foods (especially if the kitten doesn't seem to want to eat the new food), it's imperative to keep your own vet very much in the loop. And, yep, not so many certified feline nutritionists out there in general - especially on the web.
Now, maybe if the OP is at home all day long, every day, that might make timed feedings somewhat do-able in the case of a young kitten. If not, well, free feeding a kitten is not a bad idea assuming weight increases as it should. The vet can also help figure out portion sizes if you want to do measured feedings while you're not home.
Also, I'm not a big advocate of leaving wet food down more than 20-30 minutes (just like I'm not big on leaving human food out terribly long). Other people have different opinions, but I've had food poisoning myself, and am not willing to risk it in my house, for anyone living there. Besides, dried up wet food isn't very appetizing to anyone or any cat, I think.
The key thing is, I think, that a cat both thrives and enjoys his food - doesn't make a bit different what rating that food gets on the internet when it comes right down to it.