I've been doing some attacking today, and it seems my losses have been a little better than they have been over the last week or so.
Picking my targets (low and high defence, but with lots of cash, or high level buildings), I have lost a few of the standard loot and low level units, but a lot less in terms of valour units and low loss units. The breakdown is as follows:
Low level infantry losses - 25 ish
Low level vehicle loss - 15 ish
Chinooks - 4
Bradley's - 2
Sub - 1
Combat chopper 1
Compared to this time last week where if I even thought about attacking someone, my harriers and destroyers disappeared from my inventory, this seems to be an improvement.