It's probably significantly lower than that as well if you take out all the accidental deaths that occur in people's 20s.
On a more skeptical note, I'm very doubtful of any claims to predict timelines related to medical or technological advances. We've been trying for a long time and with much better funding to cure/treat things like AIDS and various cancers and only recently have we made significant progress on those fronts.
My general impression of modern medicine based on conversations with friends and family members in the medical field is that, while the cures are getting better, the best course of action is to take a conservative approach to life (avoid smoking, severely limit drinking, exercise and lift weights regularly, stay active, and keep using your brain), as this has much better odds of maintaining a high quality of life as you age than hoping modern medicine will be able to fix whatever's wrong with you.