Business Meeting Etiquette Tips in Mexico

From Kwintessential are meeting etiquette tips for doing business in Mexico:

• When greeting in social situations, women pat each other on the right forearm or shoulder, rather than shake hands.
• Men shake hands until they know someone well, at which time they progress to the more traditional hug and back slapping.
• Wait until invited before using a Mexican's first name.

Any other travelers want to share their business culture experiences? Do you agree or disagree with the tips above?