For a bit of context. Ron was specifically speaking about VC partners that find and pick companies to invest in. He notes that the folks actually using these new products should be the ones deciding if they are worthwhile investments.
Ron C. added: "People in their 20s are the good pickers," and said he wants his investment team at SV Angel to recruit younger folks to join them by the time they hit 30 years old. He said that older and more experienced investors are better at giving advice to the companies they fund.
In other words, the "age bigot" quip refers to the people picking the investments, not the people receiving investments. I don't know what Ron C's views are about younger vs. older founders, and as far as I recall he didn't make them apparent today.