'low' is relative numbnuts.
No.
He is not on a extreme protein diet, but his protein intake is moderate, or slightly above moderate.
Anyone familiar with classic nutrional ratios would know this, and wouldn't claim that this guy was on a "low" protein diet.
If you or Abeles have been getting 50% or similar of your calories from protein in the past, I can only tell you how sorry I feel for you two.
Anything above 15 % is definitely higher than normal protein intake.
FWIW Bast, a classic athlete macro ratio looks something like this: (Carbs/fats/protein) 55/30/15
Perhaps you could use that info for your future diets.
Good luck.
-Hedge