I didn't realize it was the same song until I came in here. I thought it was another song they recognized. I'm chalking it up to how loooooong it's been since that episode and the fact that BSG is the only place I've heard it.
How could you not recognize that song? It's so distintive. Plus, Tigh goes "
WHAT... THE.... FRAK??
", then Tory says "That's the song!". Why would they do that to just any old song they recognize?
And it's been used since Crossroads, as the final five theme that Bear composed, it underscores a lot of scenes subtly, and sometimes like Revelations and Sometimes a Great Notion the song is played overtly again.