BartK Thought I'd revive this original thread with my recent discovery of the usefulness of Sonatinas for sight reading practice.
They seem to be chock full of the kind of content that would be useful for recognizing patterns as opposed to individual notes and come in a variety of piano exam grades from 1 to grade 6.
A month or so ago I got the first book of Faber's Piano Sonatinas. It has Sonatinas ranging from piano exam grade 1 to grade 3. I've sight read through all the grade 1's and now have them flagged for future quick study pieces.
Sonatinas aren't my favorite classical genre to listen to, but they're actually a lot of fun to play.