The article reports that the M2 Ultra is basically even with a 4060 Ti in OpenCL compute which they refer to as a mainstream card. It is more a notch above entry level. The "best of class" 4090 is actually 2.5x faster. But again, this is OpenCL so who knows how the two compare in a more relevant benchmark.

Regardless, wccftech is far from reliable. IIRC, /r/amd blocks links to the site.