So, so true. I used to think it was the "least bad" / optimal choice until I figured out that it was much more Fun™ to just mess with them (and/or break their mind, if you're so inclined).

You have more patience than I.

Courtesy note to others for DaFranker's benefit: the parent was (probably) written in response to a version of the grandparent that contained only the final sentence. "So, so true" would best be interpreted as applying only to the second (and more important) of the two points I made.