@paulag, I just searched for 10 of my Steemit posts by title. Only 4 out of 10 ranked better using my web properties or other sites where I posted first. I have two websites that I own where I use SteemPress to cross-post to Steemit on a 10 or 20 minute delay (it started out 20 minutes and I changed it to 10). After it posts on Steemit, I go into the Steemit post and edit, adding a rel=canonical tag to the link pointing back to my domain. It looks like older posts could go either way. A higher percentage of older posts rank my websites higher than Steemit. However, it's the newer posts I'm concerned about--post HF22.

It's possible that my personal search is affecting the results, so this is not conclusive. I've spent more time on Steemit lately than I was spending before HF21.

Another thing I'm seeing is the SERP sometimes shows Steampeak or another front-end above Steemit, and above my own properties. I never use Steampeak. I don't use any of the web-based front ends. I only use SteemPress. Sometimes, I use Steemit's UI, but only because lately eSteem Surfer hasn't been publishing for me. I think that might have something to do with Keychain.

One interesting note, none of the posts I checked where I posted first on Narrative and cross-posted to Steemit have better rankings with Narrative. All the Steemit versions are on top.

Bottom line: This is going to need further investigation.