Kinda, what happened is Tim Hortons used to get their coffee from a supplier that would roast the beans for them, when they were bought out they switched to roasting their own beans which was cheaper.
When McDonald’s entered the market they approached that same supplier and a blend was created for them, its not the same roast as Tim Hortons. But it is a premium roast vs Tim Hortons roasting on the cheap. Which is why Tim Hortons coffee got weaker. McDonald’s coffee is more akin to what Tim Hortons used to be.