Well yes, we have seen that before, haven’t we? At PSR...
Its a lovely friendly website, but some people are just a little to much biased to Yamaha..
Its just like with apples and pears, most like apples, some like pears.
Where it comes to taste, its just opinions and they are all vallid as long as they are not biased.
The PSR Tutorial site IS, primarily, a Yamaha website, a site where Yamaha keyboard owners go to learn how to use their Yamaha arranger keyboards. Hence, the name of the site.
In contrast, the Synthzone has a General Arranger Keyboard forum section, where all arranger keyboards are covered.
All the best,
Gary