Although I have never cut down any wisteria by accident, I think you can count on it coming back. If it has had enough time to sink roots, it will probably bounce back. That will depend a lot on the soil it is planted in, and a bit of luck.
That being said, vines are growers. Their natural habit is to be browsed and chewed off by herbivores, so I would expect it to come back.
NEXT: Give your little vines some mulch, so as to cool their feet and let the lawn monkey know that it a landscaping plant. Vines typically grow in the shade, too, so don't let the sunlight burn it up. Vines (in general) grow at the feet of shade trees, and must ascend to the sunlight. Mulch & moisture will help.
If nothing else, you have only lost two months of growth. You can always replant.