gaigai, I applaud your approach to calculate the stats. Normally, it's the most logical and unbiased way to understand the situation.
But some time ago (not that long ago), Patrice did a major clean up job on the GCC section going all the way back to the very beginning. I don't remember the exact numbers as I cross-referenced the database, but it was well into thousands of posts. So your stats are off. You are now looking at the sanitized GCC, not at the natural state of it.