Here in Finland my intuition is that about 80% of broadcast professionals edit with FCP7 and 20% with Avid. At the moment I haven't yet heard any big facilities moving to any direction. It seems everyone is still doing waiting game and watching how FCPX evolves and what Adobe brings with CS6. Of course Avid people will stay with Avid but it seems that for FCP7 people Avid is the last choice at the moment... Although personally I have to say I was really impressed how well MC6 works with AJA Kona cards after terrible performance and bugs in Premiere. But I guess FCPX's perception is more or less same here in Finland than in US.
Best
Tapio Haaja
On-Air Promotion Producer
http://avseikkailuja.blogspot.com/