I have a question about bagging hops for the boil. I typically use hop pellets and just drop them into the boil kettle. Recently at big brew I noticed a lot of brewers using mesh bags to contain the hops for the boil. I also saw someone using a hop "spider" which was basically a large mesh bag attached to a PVC collar with posts to the edge of the kettle. The hops were just dropped into the bag and later the whole bag removed and the wort drained. My question is there any loss of efficiency or extraction by bagging the hops?