If you were 42 and spent the last 20 years working in Big Corp - even if you did impressive work - I'm sceptical you'd be on an even-footing with a 25 year old who spent 3 years at Zynga.
I would disagree with this, depending on the focus. That is, if the person who spent 20 years at "Big Corp" was doing a startup in a related domain to "Big Corp," she would have a large network of contacts, and years of domain experience in the problem-space she's tackling. The person who spent 3 years at Zynga likely only has a brief experience of how to poorly run a company, and few contacts outside of the gaming world.
I would disagree with this, depending on the focus. That is, if the person who spent 20 years at "Big Corp" was doing a startup in a related domain to "Big Corp," she would have a large network of contacts, and years of domain experience in the problem-space she's tackling. The person who spent 3 years at Zynga likely only has a brief experience of how to poorly run a company, and few contacts outside of the gaming world.