Stephen, thanks. I'm a little confused about the color too. There were a few branches/twigs of these and each one was pretty much the same... a bunch of the very green ones and nymphs as seen in the other linked picture and one Thorn bug that was this more bluish green color farther down towards the bottom (you can see a few of the other color green in the background of this picture). I gently poked several of the Thorn bugs, but only these bluish-green ones would "kick" me - and it was a kick that I could feel pretty well too.

After looking at the pictures on the link given under the other picture, it shows a thorn bug similar to this color, but it is marked "female". I had just assumed that this one here was the male protecting all his females farther up on the branch, but perhaps this is the mother of all the others protecting her brood? Maybe the thorn bugs get this color when they age? Now I am curious and will have to look for these again when I next visit Southern Florida.