I always trust Dave Kearns to tell me what he really thinks, so this review of my InfoCard For PHP Tutorial is encouraging:
Finally got around to watching the tutorial, and it's a good one. Simple concept, easily grasped nothing too techy, but still not condescending.
If only the narator was a bit more enthusiastic!
I think it will really help you understand metasystem and InfoCard technology if you take a look.