I watched a New Zealand episode of The Apprentice and I have a word usage question that I don't think anyone here will be able to answer.

The teams were creating a luxury organic shampoo and conditioner. One team went for a brand name of "Everyday" which didn't seem to carry the same implication that it would in the UK. An "everyday" product in the UK would be a cheap product, possibly of a generally lower quality.

Thoughts anyone?

They should have made it sound more upscale by caling it Quotidian.

Would “everyday” carry the implication of ordinary, commonplace or inferior in the US?

It can certainly be used to mean that. The inferior part of it is in the eye of the beholder, I think.

Definitely, to me an "everyday" shampoo and hair conditioner would be cheap, and certainly not luxurious.