Well, watching the first dvd, they don't cut in 
with the digital animation until episode 6 as far 
as I can tell.  So the first 5 eps of the series 
are 99% if not more cel done (just my 
observation).  I have fansubs of the later eps, 
but I don't trust judgements made on tapes.  
Can't wait for the whole series to be out on 
DVD! :)

---Fireye