Human genetics before and after the bottleneck

NPR has a TED Radio Hour I was listening to tonight. It was a fascinating program on the origin of modern humans and related topics.

Quote:

In this hour, TED speakers explore our origins as a species — who we are, where we come from, where we're headed — and how we're connected to everything that came before us.

In the segment, Why did humans migrate out of Africa?, the beginning of language among other things is explored. The hypothesis put forward is that this occurred just after the bottleneck ~70,000 years ago. He suggests in the subsequent 10,000 years, art, language, and advanced toolmaking and migration took off.

I'm curious what people think of humans having taken a large evolutionary step at the time of the bottleneck?

The future prediction was interesting as well: Homo evolutis is hypothesized in the last segment.