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tedster - 4:15 pm on Oct 25, 2011 (gmt 0)
Welcome to the forums, kavv23.
The author of a page can name their CSS classes anything they choose, and for some reason they chose the name "hiddenH1Text" for this class. What this class actually means is defined elsewhere - either in an external .css file or in the <head> area.
There are many legitimate reasons for making a bit of text hidden when a page loads - for example, some user action (like hovering or clicking somewhere on the page) may trigger a javascript that changes the visibility of the element.
It would be rather foolish to try to game search engines with hidden text and then advertise the fact so boldly right in the code. Then again, people do foolish things.