Years ago we toyed with retiring in Mazatlan. It wasn't part of our decision (really, no decision to be made) but the taxi rates were definitely WAY higher than here!

Zihuatanejo or Mazatlan? That is not a fair fight. Zihua wins hands down.

A rate not posted: up to Amuleto (and back down after dinner) we were charged 80 Pesos.

A couple of more rates…

For at least a couple of years, Troncones/Zihuatanejo has been M$800. Troncones/airport has been M$1000.

I am looking for the latest taxi rates in the Zihua and Ixtapa area. Where can I find these?

Here you go:
http://www.zihuatanejo.net/localtransport.html#taxi

We had our own car during our recent visits to Mazatlan, so didn't use taxis, but were told the rates for their "pulmonías" are at least 3 times higher than Zihua taxi rates, while the other cabs, (i.e. non-pulmonías) are easily double Zihua's rates. And the pulmonía drivers are so aggressive, you cannot stand or walk on the sidewalk without 3 or 4 of them honking their horns to get your attention. Zihua's cabs are a bargain, at least for short trips within Centro.

On the other hand, Mazatlan's buses are normal size, unlike Zihua's tiny, crowded combis.

The driver going up there was very nice and got a 20 Peso tip. The driver taking us home was a jerk and just got the fare.

And how did you determine the return driver was a jerk?

A rate not posted: up to Amuleto (and back down after dinner) we were charged 80 Pesos.

That comes under Cerro del Vigía, and I'm surprised you got a 10 peso discount. It's usually 90. I'd've given the driver at least a 10 peso tip.

I am looking for the latest taxi rates in the Zihua and Ixtapa area. Where can I find these?

Here you go:
http://www.zihuatanejo.net/localtransport.html#taxi