I think the release date may be part of what is going on. A lot of engines are built for the summer use in the winter. If these were out even a couple of months ago, I think some dyno testing would be done, and even some racing/driving in certain parts of the country. Also, they really have not been out very long, and the shops that have them are still figuring things out like rocker arm geometry, parts needed, and so forth while still trying to do their normal engine building business. Personally I'm will be ready to lay down my cash for these when my project gets to that stage. They would have to be a catastrophic failure for me not to buy these over Eddy's or, EQ's.