Vintage Vogue Sizing?

Hello all!  A quick question re Vintage Vogue re-issued patterns.  Do you find the sizing runs true to the envelope measurements, too big or two small?

By Vogue's online size chart I am exactly a 12 on every point, however the last dress I made from the Vintage Vogue range (my nemesis V2902) ended up a size 6 (due to seam fabric issues) and fits really well (except for too wide straps cut on size 10).  I want to buy some more patterns from the range (they're on sale btw, $4.99) but I don't know now whether to get the 6-10 or the 12-16 size, I'd like to avoid having to grade it. So was it just that one reproduction or does the whole range seem to run big? What's your experience? Thanks for your help!