I forget since I was an ERP and didn't pay a whole lot of attention to what 'rules' landed people on the ISP and VSP lists... did that make you an ISP or a VSP @rlh?
Either way, I'm sorry to hear someone with 4 promos was put on the hit list by that SL4. Honestly? It was the way that whole thing was handled (badly).
(my opinion only) I don't think that has anything to do with age discrimination though. I've heard and read enough stories that management was n't made aware that SL4's were going to get on a hit list. Some mgrs actually thought they were doing the nice thing by giving someone a higher raise and less stock, just to learn what a SL4 would mean down the road. I think it was a sh*tty way to handle that, and worse, a LOT of deadwood didn't get cut, but some very good people did. You sound like one of the latter.
Then there were others that got the dreaded SL4 because they weren't there a full year 'providing value' if they were on an extended medical leave for themselves or a loved one. The higher stock levels were given to those that did more things (had more time to do them). I don't find that fair but then again, the world isn't very fair. I can't tell you the things I find unfair but there's not a d*mn thing I can do about it. When there is I'm all over it! lol :)
Anyway, sorry it worked out that way for you and anyone else that got hit in that manner. it was poorly planned IMHO, and a lot of good people got hurt.
Good luck with your next venture. :)
-nhb