apparently not all ICOs are securities, because he wouldn't comment on ETH in the same breath.
He can't say anything about individual coins or tokens because of how much his words can impact their markets. It would have been rather weird if he actually said anything about Ethereum.
He was asked about some other (non crypto) stuff as well, and again refused to talk about individual assets or tools. If we just look at what he said about securities, then it's clear that Ethereum is a security.
Coinbase is one of the most regulated exchanges in the US, which means that they have the approval of various regulators in order to have Ethereum listed, and since recently even Ethereum Classic.
Is there a way to browse through their listings to see what they registered the various crypto and token assets as? That should clear things up a bit.