Actually, SV980 is more like Reynolds 753 per tube set weight schedules I have seen. And IIRC, SV980 is supposed to be heat treated, just like 753 tubing.
I do find my 1984 56cm PSV quite whippy, compared to Columbus SL and SLX steel bikes I own. Doesn't bother me as I'm so used to its riding characteristics after owning and riding it for 35 years now.......