How do grass plugs work? 8 week grow in, start to finish.

Check out this progression from one of my customers from 2021.  This was just about an entire yard project but you can see a few patches of of existing turf.  I believe this yard was sprayed for weeds prior to the plugging project.  His began plugging in June 2021.

Pic#2 is about 3 weeks after plugging

Pics #4 and 5 were at 8 weeks after plugging.

Here's what the customer said, "How's that for time travel? 8 weeks and the bare area is lush!".