Nice tutorial! Definitely explains the basic ideas for playing with pusher well. Only things I'll add:
White blocks: They DO continue and improve your chain (that is, a white block hitting the bottom/disappearing counts as a "match" as far as chaining goes), BUT they also block the clear board bonus. So be careful when picking them up; don't pick one up if you already have matches on the board and a high chain bonus and/or are planning to make a big match (where the 100% bonus far outweighs the 2000 bonus of the block).
Clear board bonus: I think you under-emphasized this in general. Yeah, chaining is extremely important and all, but the 100% clear board bonus is what makes Pusher competitive against Pointmen and Erasers. This is especially true on high traffic songs, where there's a good chance that you will be able to quickly produce a match after clearing the board and thus not lose your chain.