Yep its true, google is actively removing pages from its database, many many sites are beind de-indexed i see google has just got a wake up call otherwise this would not be happening, i have been monitoring my sites for the past few days and saw my pages go up and down all the time i couldn’t figure out what was going until i saw alive directory getting de-indexed slowly, here are some before and after shots..
Last night..
Right now..
Many of my sites are doing the same, going up and down…but mostly down.
This is no glitch,google is just trimming the bushes 
