That POV is speculative and inconclusive.
Although, we are pretty convinced that coffee will probably not lead to a huge reduction in the effectiveness of creatine supplementation, we have decided to go ahead and do a definitive study. In collaboration with our lab mates and lab director at the University of Western Ontario, we plan to look at the effects of creatine, creatine plus caffeine, creatine plus coffee, and placebo. This study should, uhm, dissolve this debate once and for all. Until then, we won't be kicking Mr Coffee or Mr Creatine out of our lives just yet.
Did they ever follow up with their plan to investigate? What were the results?
And consider this, an 8oz cup of coffee can have as little as 60mg of caffeine. An ECA stack or a Caffeine supplement has 200mg. Add a couple of supplements to 2 cups of coffee and some tea, and you’re looking at 600mg or more in a day.
Study or not, I know from personal experience that high levels of caffeine did negate the effects of creatine for me.
Who knows, maybe it's different for eveyone.