I've been doing a little TK work lately, and I was looking through my Emu book. I noticed that there is a new canvas item called Group, that collects other items and allows you to act on them as a unit.
Traditionally, I would just tag all the items with a unique tag and use it to act on the items.
So my question is: Is the Group type just syntactic sugar? Or are there performance and/or memory benefits to using groups?