I second that. The technology to profitably mass-produce chips at smaller feature sizes than 22 nm simply does not exist yet. It's all still experimental. That Intel is even managing to produce at 22 nm can almost be called a miracle (and considering these delays, apparently they aren't actually managing it all that well, at least not yet).
Source: my employer, who makes about 80% of the optical lithography gear used by foundries and chip manufacturers around the world, including Intel.
I agree. The continued ability to produce finer and finer lines absolutely astounds me.
I remember when all the experts were saying that 100 nm might be the limit - and the same statement has been made half a dozen times since then.