Oh, the 22 meg bias resistor is actually 72k, that was a mistake on the schematic, but I donīt think it is related to the speed anyway.
Also known as "perfboard" -- Jon Patton's layouts largely use this, as does a lot of the Run Off Groove stuff.
I need to re-check those voltages in the PB. I think I have a couple written down incorrectly. I would hold off before doing anything else (should be able to check in the morning).