I have my doubts about this. I don't have any studies to cite but I see some animals that have a very long life. There's even a whale(mammal, like us) that can live to 200 years. I don't think that any of the current generations will go to 200 but in time I think it's possible to extend life span.

I can't find it but years ago there was a fruit fly study that linked the age of the parents to a longer life span. The older the parents were the longer the lifespan of the next generation. I wonder if now that people are becoming parents later in life, it will increase the overall human life span. It's a stretch to link a fruit fly to a human but it's something to think about.