A show's content = how good it is (due to number of people showing interest in it). Thus it's content raises more interest & increases the number of people being interested in it, therefore it becomes popular.
According to the ratings, more people watched Clannad (more so Nanoha StrikerS, Lucky Star & Code Geass S1). What does this tell you, It means that these series were more popular than Gurren Fagann. Your response is proof that GLfags get very defensive over their beloved series, thus they say such things because they're in denial that these (certainly two completely different anime series) were watched by more people, ergo were more POPULAR than GL. Your response here ( >>11819316
) is proof, because I'm not >>11819289
, because I don't go in for this 'post rating' meme. More like YOU'VE conceded defeat, because your blind denial of the FACTS that GL was 5th behind Clannad, Nanoha StrikerS, Lucky Star & Code Geass in 07 indicates this.