I don't think any of that matters to individuals. Whether or not you were alive during Reagan's presidency, your opinion of him and his politics will not be shaped by the circumstances of your own life during that time, but by your personal influencers - a parent, a teacher, a book, etc. and what you glean from that model. Even if I'm in the best of places right now due to Obama's health care or whatever, if I give him credit at all it's going to be either "because of him" or "in spite of him" depending on the things and people that really matter in my life that inform my politics. But it could equally likely go either way. Also, being influenced more by interpretations of events than actual events, means whether I was 6 or 60 when they happened isn't relevant. I know a lot more about the Civil War than a lot of people who lived during the time it took place, simply because I've chosen to read about it.
Obviously I'm just spitballing here, so fire away.