It's not slanderous to say something is derivative. Do you think an MC-er would be offended if you told him his suit looked like a Huntsman? If everyone could do that then noone would make the trip to Savile Row/Naples etc. It's a skill to be able to see what looks good in other designs and adopt them. Brad et al are not "bitching" or moaning here so I don't really understand the commotion. I don't think anyone needs to justify taking inspiration from anyone esle. Just don't expect us all to sit round and commentate that it's revolutionary design or anything like that.