From James' link,
this sums up my reticence to use solder with crimped terminals.
Also from that site,
here's an internal comparison of crimps using a dimpling crimper (similar to the one Richard uses), versus a ratcheting crimper. (Like Don, he cut the crimps open to show the degree to which the strands are pressed together.)
My typical practice is like Don's, except without the microscope. It's served me well so far.