The Polish Wikipedia was the 4th by article count, but the 7th by compressed database size, for a quality of 4 - 7 = -3.
Main space or all database? We don't like many edits per article in short time. Look at
http://stats.wikimedia.org/PL/TablesWikipediaArticleEditsPL.htm
http://stats.wikimedia.org/PL/TablesWikipediaArticleEditsEN.htm
http://stats.wikimedia.org/PL/TablesWikipediaArticleEditsES.htm
http://stats.wikimedia.org/PL/TablesWikipediaArticleEditsRU.htm
http://stats.wikimedia.org/PL/TablesWikipediaArticleEditsFR.htm
If any (meta)page is huge, we do everything to reduce its growth of size. So, often we create more subpages.
But - some days ago we talk on IRc with Japanese wikipedians about comparisions of wikipedias - not only about "count of..." and quality. Wee need to know more about our projects.
regards
Przykuta