Voted "Longevity Escape Velocity Will Be Achieved Later This Century". LEV is very speculative idea. We don't know if it is attainable. What I think (or hope) is that by mid-century life expectancy will reach the maximum human life span of ~120 years but in better health than those who reach this age today.

For Kurzweil, I think he is biased toward predicting things to happen during his lifetime. There are no known therapies in clinical trials today that will extend significantly lifespan in the foreseeable future. Such therapies should be in the news, if LEV is going to happen in 10 years' time. Even epigenetic reprogramming, the most advanced concept, is further in the future and its impact, if any, on aging is still unknown.