There is something wrong with the xls, all the games have the same results!
The top 10 games are probably good quality but a lot of games have got in there because they are new and reasonable quality/addictive. I've seen some games that are addictive but not such good quality still do well. The top 10 on BFG and Reflexive is not artificial, I know that for sure, can't say for other portals but it's probably valid. Also BFG has a top 100, now if a game is in that list for a long time you can be sure it is probably good quality and certainly addictive.
The top 10 games are probably good quality but a lot of games have got in there because they are new and reasonable quality/addictive. I've seen some games that are addictive but not such good quality still do well. The top 10 on BFG and Reflexive is not artificial, I know that for sure, can't say for other portals but it's probably valid. Also BFG has a top 100, now if a game is in that list for a long time you can be sure it is probably good quality and certainly addictive.