If you got lean bass with the speakers that close to the back wall just wait if the speakers get moved out from the wall. If the speakers are that close to the wall behind them you should have to much bass.
A square room doesn't help so maybe that is the reason for the speaker placement that they came up with. You can not follow someone else room placement as yours can be completely different. You can always make your current location with tape and try moving them around and see if it sounds better.
You can always try Cardas speaker placement. I has always worked well for me.
http://www.cardas.com/content.php?area=insights&content_id=33&pagestring=Room+Setup+8
A square room doesn't help so maybe that is the reason for the speaker placement that they came up with. You can not follow someone else room placement as yours can be completely different. You can always make your current location with tape and try moving them around and see if it sounds better.
You can always try Cardas speaker placement. I has always worked well for me.
http://www.cardas.com/content.php?area=insights&content_id=33&pagestring=Room+Setup+8