I think its hard to tell from the demo how effective the AI is with units. The game settings do make alot of difference. I still think the discussion and suggestions in this thread are valuable, and I wish a dev would deign to let us know how things are currently set up.
I had some time to fool around Last night and I was playing with Indies at 6 or 7 (can't remeber exactly) with all nations on normal or difficult on the bigger map. Anyway, by turn 10 I had expanded or scouted to other nations borders (not surprising as the map was crowded), by turn 15 I had 4 nations declare war on me, though only one was actually adjacent to me. I routinely saw armies of 100+ units moving around though, and I managed to catch Marginon's big force with mine (playing Pythem) I slaughtered them, mostly because I had sent in an assassin who picked off a couple of mages (well inquisitors... you know...) and my Arch Therug with 3 slaves doled out some nastyness...
Anyway, a few turns later I regrouped and reenforced and set seige to their capital. The next turn I had to repell a relief army with 8 summer lions and assorted pikeneers and x-bows. I beat them back, but it wasn't clean... So the AI does seem capeable of using summons, and it will make bigger armies.
Part of the problem some of you are encountering is probably due to not having enough opponents on a too big map. With a cramped map the AI is forced to consolodate more (though it could still probably use some tweeks to the units it recruits). In the next 20 turns of this game it will be interesting to see what the other nations who declared war on me do, 2 more of them now have provinces boarding mine, and if I can't finish of Marg quickly I may have to recall that beseiging army to deal with other threats. All in all this game has been entertaining, at least for the short duration it's Lasted.
Again though, there is alway room for improvement of the AI, I hope that the discussion in this thread is not being ignored
