IRV inconsistency

[DEMOREP1 at aol.com]

Mr. Simmons wrote-

I recently attended a meeting of FAVOR, an Oregon group in their final
stages of putting an IRV initiative on the ballot.
---
D- Publicize my Hitler-Stalin- Washington example to scare the voters / 
opinion makers bigtime against IRV.

34 HWS
33 SWH
16 WHS
16 WSH
99

With IRV, W loses. H beats S 50-49

W beats H 65-34
W beats S 66-33

How often will the final 2 choices be extremists if IRV is being used (with 
the winner claiming some sort of *majority* *mandate* for his/her extremism) 
???