With all due respect, what utter BS!!!! I adopted 3 adult strays, well beyond 2-3 years of age, and they're lap cats. And all the other adults, if I adopted them, would be in bliss, poor things. Ferals are cats that don't let you even see them, let alone pet them. I bet yours were born in a home and dumped.
Jusjim, yes of course, but I'm going by the American definition, ferals = born from stray/feral mother (you don't see them, even. They come feed when you're gone.), stray = dumped or born from stray mother (they usually play hard to get for some time and often end up as lap cats).
Straysmommy, sorry but it's you that's wrong. Feral KITTENS are different, and feral adults can become accustomed to people over time. An adult feral might never be 'domesticated' the way that people normally think about it, but they can build trust and relationships over time.
The fact that the OP stated in his first post that he trapped the kittens is a fairly good indicator that they were feral. If they were dumped you'd be able to catch them, feral kittens mean traps usually.
I'm feeding them periodically and keeping my hand in the cage very close to them while they're eating. I'm also petting them. One is more skittish than the other one, but like I said, we are able to pet both of them. There is some hissing, but no biting or scratching yet. (Sorry I'm being redundant - I think it makes me feel better to write this all down). They have also both been held on a lap a few times. They don't love it though. I'm also leaving a radio on all the time in their room, so they can get used to voices.
OP, at the age you caught those babies if you put a lot of work and time into it you could easily get them to the point where they'd be considered adoptable by anyone.
You're already on the right track for sure, but I have a few tips that might help out.
You said you were holding them on your lap every day, that's perfect. While you hold the kitten gentle scratch behind their ears and rub them all over. If you have to forcibly hold them still then do that with one hand, while petting and caressing with the other. Pay close attention and when the kitten starts to relax relax your hold as well, but don't let the kitten jump away. I like to hold them either by the scruff (which is still safe at this age as long as you're careful), or if you're not worried about biting, with your thumb and fore finger around their neck and the rest of your fingers wrapping around their chest. This prevents them from escaping and they should learn to relax and lean in for cuddles quickly. If you can get them to purr and snuggle let them go and choose to stay or leave on their own terms. I never put a kitten down until it purrs though.
The other thing that will help the most is play time. Ideally you want something where you can sit in one place, move minimally, and have them playing around you to the point that they forget you're there. Laser pointers and wand toys work best. Either way this is something that should only happen when you're around. You want them to see you as the bringer of all things fun.
Once they will come up to you if you sit down on the floor you add more people. Take them into a room like a bathroom, or somewhere else with no places you can't reach them if you need to, and just sit or lie on the floor and let them explore you. Introduce them at first to one new person at a time, and have that person just sit calmly while you play with the kittens. As the kittens get more comfortable with that you can bring in two people at a time and give them toys. Make sure your helpers understand they have to speak calmly and not get excited or move quickly.
Good luck...and post pictures!