I want to know the answer to the following question:
How much slower do games run on PAL consoles than NTSC due to frequency differences?
All the background I'm provided with is that "Some commercial PAL region releases exhibit this same problem and, therefore, can be played in NTSC systems without issue while others will face a 20% speedup if played in an NTSC console.". Is that enough to answer the question?
Answer: no