A current noise of 'tens of fA/rt-Hz' is not so low.
For AD8065 you declare a current noise of 0.6fA/rt-Hz, more than an order of magnitude lower.
It is very useful to add this information in the datasheet of AD8655: if someone want to use this operational amplifier in a trans-capacitance configuration, e.g. for the readout of a MEMS sensor, the current noise contribution can easily dominate!