What's the latest on tipping in Mexico, Cancun in particular?

I usually don't ask taxi dricers for change if cange would be 10 pesos or less. To have a private service take us to the resort and load and unload luggage, I tip $2 per person with a $5 minimum.

At the hotel they suggest $2 per bag. We usually have more than 5 bags and less than 10 for 3 to 5 of us. I tip no more than $10. This year the three of us will have 4 bags and a back pack and we will likely tip $8.

At restuarants if tip is added, we do not tip except for exceptional service. Then we add around 5% or $1 per person, whichever is more. In fancy restaurants where tips are not added, in Cancun we tip 155.

Is this about right?