Yes, I read the article. Did you read the entire thread discussion? Perhaps not, so I'll summarize. The general consensus is that it's pretty sketchy info, especially for a product that isn't even available until October. The iPhone 13 mini launched at the same time as the iPhone 13, but the iPhone 14 Plus launches 3 weeks after the iPhone 14.
Only a few people in this thread think the 14 Plus will sell worse than the 13 mini over the course of the year, although opinion varies as to how good it will sell overall. Some of us think it will be one of Apple's best sellers, while others think it will be a poor or mediocre seller, but most people don't think it will sell anywhere near as bad as the mini did.
The iPhone 12 mini also launched later so that's no different, not to mention during a pandemic where people were staying at home. The difference is that unlike the mini the plus does cannibalize pro max sales so if Apple has any sense it has to sell a lot better to make it worthwhile.