I think it is most unlikely the pitots were at fault.
Bearfoil,
I wouldn't necessarily say they were not involved at all.
But I fully agree they can't be the only reason for the accident.
Although there were incidents with the pitots in the past, a really simultaneous freezing of all three appears rather remote to me.
I'm sure the path to the accident was way more complex and just replacing the pitots is not a satisfactory answer to the mystery.
Making sure it won't happen again can only be achieved by knowing more about how it happened.
And BEA and AI know that.
And that's what makes me confident we haven't seen the last search for the recorders yet.
regards,
henra