It is great to see people with disabilities modelling and appearing in tv shows, and I look forward to the day when it doesn't feel like a 'novelty'.
Downs Syndrome and other conditions are always seen through such a negative filter. From the very moment we find out we are pregnant, there is a fear of disability, and it shouldn't be that way - seeing people with disabilities in the media just being models and actors and presenters etc is hopefully part of 'normalising' something that a lot of people would like to see as 'other' to their lives.
Agree with other posters about the 'mental age' thing. Ds's paeds don't use the term 'mental age' they say it isn't a useful or relevant way to look at a person, whose development is made up of many different areas.
Ds nearly 5) may have very little expressive speech (so would be in a developmental age bracket of 8-20 months in this area), but has a lot more to say than an 8-20 month old, knows his colours, numbers, tells jokes and can write his name - he just needs other ways to communicate.
People can't be boxed up into one neat defining age - a man of 30 may be deemed to have the cognitive abilities of someone a lot younger, but he would still have 30 years of life experience, and have other areas of development that would be at very different stages.