I'm positively blown away by the grapes we planted last year. We had accidentally left a hole in our bird netting and a deer got in and stripped both vines bare, as well as breaking many of the core tendrils. Swore they were going to die; within a month they had doubled their previous size, put out an entirely new and more vigorous crop of leaves, and then proceeded to produce two entire bunches of Riesling. (on year ~1.5 after planting).
As someone who kills most everything I put in the ground, so much love for the robustness of grapes; they probably put out at least a few inches of vine a day even at this point.
You really should go check out a vineyard in November/December. It's absolutely shocking how much of the growth is removed - virtually 100% of it - each year. And every year in late winter/early spring the first bud breaks, and for the next several month you can't even fathom how much they grow.
