From the article:
"The phenomenon isn’t unique to Canada. The U.S. Federal Reserve has hiked its benchmark rate four times since December 2015, yet interest rates on deposits at American banks have mostly remained stubbornly low."

Too true - I just checked the JMMorgan primary savings account info.  For under $50 000 on deposit they'll pay you a whopping $1.25 per month or a fat 0.03%.  No wonder the Americans don't have any savings to speak of.