For better or worse. And that was true when I was composing and producing music nearly 20 years ago. It always sounded like Jeffrey's music. I was incapable of creating a jingle, even when I really needed the money. And that's just me, and there are lots of people better than me.
Style is an important component of authorship in any medium.
You always know a frame of Hitchcock or Bunuel, even if you haven't seen the film. Web work serves the content, the viewer, the client, but all of it is filtered through the subjectivity, prejudices, and limitations of a creator or a small group of creators. No matter who or what they are serving. I think I answered your last question first. He's one of the few people who use white in interesting ways, and his overall effect is always understated.