So I've looked into this further since above post by me, which was uninformed particular to hops, but true of many vines, and video linked below is a good counter to it.
However, between the 8 hop varieties I have planted, some put out more early bines that are ''bull'' type than others. A key to judging this is may be the space between the inter nodes, if they are close together, may not be bull even if first shoots.
Anyway, I'm going to let mine grow unpruned again this year, but will revisit this myself a little earlier next year.