Please refresh my memory as to when this was.
He's not far off.
Back in 1994 before PC GPUs got the kind of investment they did, the Saturn and PS1 could outperform the PC. The PS1 in particular was rocking with high end PCs up until Voodoo 1 appeared in 1996.
The Dreamcast was the high water mark - in 1998 it could outperform dual Voodoo 2s tied to a Pentium 2 450 (not to mention the previous real time 3D leader, the Model 3 arcade board). More polygons (lots more), higher colour resolution (24 bit native vs 16-bit), better texture compression, even supported aniso and per pixel bump mapping. The PC version of CLX2 in the DC came later and was *massively* watered down.
Original Gangster Xbox had an uprated version of the highest end PC GPU at the time - Geforce 3 - but with twice the vertex shaders, some tweaks that didn't hit PC until GF4, and some hardware features exposed that were never exposed on PC.
Finally, Xbox 360 could deliver results that were initially on par with the likes of the GF7 GTX 7900, but would ultimately surpass it as Xenos utilisation improved. Xenos was far more efficient and also supported early GPU compute. CPU, while more difficult to utilise, was on par with fast dual core Athlon 64s - at least according to Capcom, who were at the time making one of the most scalable multi-core, multi-thread engines.