I saw a video one time, a while ago, where a shirt printer was demonstrating a technique for getting an opaque white on a black shirt - the "push stroke". While I don't really think this is the case, it did get me to using the "push" stroke and I gotta say, for me at least, it lays down more ink, more consistently, than the pull. Also it is a lot more comfortable for me, and less straining on the muscles since I can use more of the weight of my body for the movement.
I would like to start standardizing some of my techniques and haven't decided which is better. Most places I read information about printing only mention pull strokes and a lot of people don't even know what I'm talking about when I say push stroke.
So - is this heresy? People must be sweet on pulling for a reason. I know that it will fuck up your registration if you switch techniques in the middle of a run if you do not use clamps at the front of your frame.