Well that has been one of the things I have been impressed with since Mancini took over... immediatly we stopped conceding 2-3 goals and started acting like a defence... that without any new players coming in... this is so important! and now we are seeing it more clearly... I truly think that Hart, Kolo and Kompany are a big reason why we are so hard to beat... Hart is so important in how he steers the defence... its easy to forget that...