Take a look at vogeldagboek.nl a birder in the Netherlands has already made some photo's with a review example of this lens(canon example).
I at least am impressed with the results.....
Great pictures !!! Good to see, more and more Airbuses at EHWO :) Well if you like plain janes....no offend but i like to see Fokkers at Woensdrecht, and if you hate to see a real plane you must like airbus..... But what the heck i am from the stone age when you had smokers on short finals (but now...