I'd agree with that 1990s estimate, very little effect -- because there never was a mitochondrial eve.
That Panda's Thumb estimate is from 2004. While I'm an "Out of Africa" advocate, I'm not convinced by the Mitochondrial clock argument either. Genetics is a field that seems to be galloping along. I'm confident this will be worked out sooner rather than later.
As for steak, I prefer a prime cut to marinade. If I need to marinade, I like to use a good red wine, Malbec or Cabernet. I follow the old saying, "If you don't want to drink it, don't cook with it". Wine and meat, I'm sure our ancient ancestors would approve.