Yes people have tended to miss out the hypermedia constraint and claim to be REST - partly because everyone's been too excited about using HTTP properly to thin

Yes people have tended to miss out the hypermedia constraint and claim to be REST - partly because everyone's been too excited about using HTTP properly to think about anything else, but also just because there's been a lack of tooling and guidelines for designing media types properly. Most people in the REST community agree on that point and now there are useful approaches and technology emerging - restfulie is a great example of this.