Sorry, it's not, and they don't.
1. AFAIK, All sharpening at forrest, except for tooth repair,is now done by CNC based sharpening machine. They do quick checks of blades to see if they are damaged, then throw them in the CNC. This is true of most sharpeners these days.
2. I've sent 5 blades to forrest over the past 3 years. On 2 of them they missed chipped teeth that needed repair (they were not damaged in transit, it came back with the wax coating perfectly intact with a clearly damaged tooth in it). 2 of the remaining 5 were nicely sharpened. 1 was "sharpened", but done very badly and didn't cut well.
Since then i've stopped using forrest, and started using dynamic saw, who have done an amazing job for me in all cases.
Forrest is a pretty high volume operation these days. This can make them hit or miss sometimes.