I know this topic is a bit old, but I just had to mention my company's policy. After fuel going up in the last few years they have sent a notice to flight crew asking us to try and land when ever possible CONF3 as it reduces fuel burn on the approach. We have never had a tail strike in the last 6 years operating 320/321. I can understand their philosophy, but I don't think we should over use CONF3 except for the odd time to keep current with power setting, pitch attitude and flare technique.
The only thing that has worried me in the last 2 weeks is that I heard from a line training captain that they might impose CONF3 to become the normal operation in the OPS manual, which I believe is not right. CONF3 and FULL should be a crews decision to make and not be made into a standard operating technique.
I hope you enjoyed my contribution.