My family and friends that have done business with Tillerson would echo the sentiments in this story. They would also tell that you should not be lulled into a sense that Tillerson is soft. The man has a titanium spine and will use it when necessary.
Regarding Tillerson's predecessor Lee Raymond, this quote from Politico...
“He’s ruthless,” said a former Western diplomat who has dealt with Tillerson. “But not like Raymond. That guy was f***ing ruthless.”