The page was linked from a sitewide footer to ensure that Google found it, and was posted and linked on the evening of March 7th. Google alerts were set up for one word from each pair so Google would notify me by e-mail when it spotted a page containing those words.
An alert came in in the late evening of March 10th for "zonkdogfology", one of the words in the first pair (part of the straight HTML). By the time I got online in the early afternoon of March 11th, it was part of the Google index and a search for it turned up the page as the sole result.
I then searched for each of the six words at Google.
- The two HTML words both generated a search result that included the page.
If you're using an AJAX powered comment module, particularly one that's remotely hosted like JS-Kit, then it's important to know what you're getting and what you're losing. Yes, you may be adding functionality to your page easily and enhancing the user experience, but if you don't get the comments indexed, you lose all that juicy keywordy goodness.