I've heard that younger animals usually have a quicker recovery time. I've only experienced Starr being neutered but his was a spay/neuter because one of bits was still inside of him. He was very groggy the first evening but by the next morning he was ready to play. I kept him in a large cage so that he wouldn't tear out his stitches and the others wouldn't play rough with him.

Now Ziggy Stardust will be my first actual spay so I hope that she'll also recover quickly. I think that Tiffany sounds like she's doing very well and being active is a great sign.