Someone pointed out that Google customized searches. It does, and if you're logged into any Google service (gmail, Google+) that makes a difference, too.
Funny thing is, I wasn't using Google but was using DuckDuckGo (a stupid name, but they don't collect user data, so they're my search engine of choice these days).
But, as has also been pointed out, it's not a good idea to use an ID and/or display name you have use somewhere else. Back when I created mine here, I think it was the first, then I forgot about it and started using it elsewhere, especially when all the social media stuff started.
Oddly, searching my old username on Google didn't bring up any results from here (at least as far as I felt like scrolling).
Anyway, enough computer talk and paranoia for one day. :-)
