EVERY site that has this enabled, takes AT LEAST 2 "refreshes" to load the actual content of the page - Or at least for me it does, but I surely can't be the only one.
The first time you load the page, nothing comes up. It just keeps looping the "wait" - and in the status bar, its ALWAYS the google +1 never finishes loading.
When you stop the page from loading & then click refresh, miraculously, it loads without problems.
However, not many people are aware of this.
When that page doesn't load the FIRST time, they close it and move on - Just like I used to do until I found out that was the problem.
So yea.. something you guys might want to think about before you go adding that +1 plugin/addon/whatever to your site.