Apart from spelling (unlikly, Stall angel, non the less) etc most of that section is wrong - especially the bit about needing an exceptional pilot to recover from RBS. Even the most basic textbook will tell you that reducing the severity of the manoeuvre, or just lowering the lever in level flight will help - to get the aircraft inverted would require active aggravation of the manoeuvre by the pilot.
The relative speed is at its LOWEST on the retreating side and as V squared reduces, lift reduces and the blade flaps down, increasing the AoA and leading to the stall.
The article doesn't mention the increase in vibration which is usually a precursor to RBS and lets the pilot know he needs to slow down.
BGring - I suggest you let someone like Nick Lappos or Shawn Coyle write for Wikepedia - leave it to someone who knows the subject properly.