Lactic Acid Formation is due to not having enough ATP in the muscle to fuel the exercise. During anaerobic glycolysis (breaking down of sugars W/O oxygen) lactic acid is produced in order to keep pyruvic acid down in your muscle cells. lactic acid dissociation can take a while(lactate + H+) , hour maybe two hours if I'm not mistaken. So I'm pretty sure that guys statement had no scientific bearing whatsoever.
This is purely from what i recall from my scientific background. I might be wrong, but i doubt it.
Lactic Acid formation really isn't directly caused by not having enough ATP in the muscle. It has to due with the presence of oxygen. First of all, NADH is formed during glycolysis as a H+ carrier. When oxygen isn't available, NADH cannot send H+ into the mitochondria (Electron Transport Chain) because there is no O2 to receive them, so NADH donates H+ to pyruvic acid to form lactic acid. Also, lactic acid does not stay in the muscles or blood long at all. It actually is quickly converted into its conjugate base, lactate.
ATP is the the energy source. Aerobic produces 36 ATP per glucose molecule while in anaerobic only 2 or 4 ATP(can't remember exactly) per glucose molecule. ATP is always formed it is just that aerobic is much more efficient. By product of anaerobic is lactic acid which is then directed to Cori cycle.
When glucose is fully oxidized, it produes 32 ATP. Glycogen produces 33 ATP.
Anaerobically, glucose produces 2 (net) ATP while glycogen produces 3 ATP.