Ayumi's reputation in Japan

[microphone]

Hello Ayumi fans!

I came across a rather offending video about Ayumi. The author claimed that Ayumi copies singers all over the world. The examples in the video were as innocent as wearing similarly fashioned gloves or striking a model pose. I did not buy any of it.
However, one comment left me wondering about Ayumi's reputation in Japan. This user accused Ayumi of borrowing lyrics from Japanese poets and Enka singers. I do remember reading something about it in an old Japanese gossip article. So, my question is how much of it has been investigated? I asked for proof to this user and he refused to answer me clearly. I suspected he is just a disturbed anti-fan but I couldn't help but remember the old article. Until I see some concrete proof, Ayumi remains the greatest lyricist in pop music. (In my opinion, of course.)

I asked two Japanese students about Ayumi and they both said her lyrics are calming like beautiful poetry. They were not fans, however. They kept commenting on her age... I'm guessing this accusation isn't a popular subject but then again, I've only asked two people.

What are your thoughts?