Yup. Creator of Counterparty here. It's funny to think that if the Core devs hadn't be so incredibly resistant to people using the Bitcoin blockchain in unexpected ways, Ethereum wouldn't exist in its current form.
I strongly disagree with the way that Ethereum was launched and the way that it was run---indeed Ethereum was a competitor of Counterparty's, with a polar opposite approach and ethos---but Greg Maxwell is the one that's rewriting history there.
I remember the hostility by certain Core devs to OP_RETURN being used for "ulterior" purposes. I remember the push to reduce the size of OP_RETURN to 40 bytes to sabotage smart contracts.
If you believe if was ever lowered, show me the commit.
The Coindesk articles contains the phrase "OP_RETURN was originally meant to store 80 bytes of extra data in a bitcoin transaction". How do they know what it was originally meant to do? If it meant to do it, why wasn't it in the source?
The first comment in the pull request is: "The maximum size for OP_RETURN outputs used to be 80 bytes, then got changed to 40 bytes to be on the safe side. We have now been running with 40 bytes for about 9 months, and nothing catastrophic happened to the Blockchain, so I am proposing to increase it back to 80 bytes."
See https://twitter.com/vitalikbuterin/status/929804867568373760