the rennsance vivace yeast i pitched a few days ago took off like crazy like i just released its shackles.
Probably because that's exactly what you did!!
When parameters are in line prior to pitching yeast, AF is almost a no brainer. When we start with a BRIX to achieve our desired ABV, select a yeast that can handle the ABV, keep the temps in range, make sure the pH is in range, provide nutrients as needed, we can just let Ma Nature do her thing.
For the most part, kits take all most of the variables out of the equation, other than temps, not so with fresh fruit and some juice buckets. Testing and correction is important, not checking the numbers is foolhardy. Let any one parameter get out of line, struggles may ensue. Sometimes hard to start, sometimes hard to finish, sometimes producing H2S, sometimes too slow, sometimes they may go just fine. We just need to help the juice get out of the way of the yeast so it can do its job, the juice wants to be wine, and the yeast wants to appease the juice.
Congrats on your success, keep posting your progress, hope it turns out great!