I've seen that speed claim made before, but I don't see it in my copy of ACDSee V8.
True, V5 was probably the fastest ever and V8 isn't even close to that, but I believe V8 is competitively fast. (and I tried quite a few before I gave into to the inevitable and upgraded from V6 to V8).
V8 is clearly superior to V6 in just about every way. Certainly far more stable.
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Stop the Insanity!
Diet and Exercise Kills!