I don't think it is normalising disability though Dawn
I think that disabled people have to be featured doing something hilarious or outrageous to be allowed to be a feature player in these adverts.
Normalising disability would be someone doing a Tesco shop or, even better, advertising tampons.
I would like to see disabled parents in Mothercare ads (do they do ads on telly?) so the stigma of disability and parenthood/pregnancy/babies is blown out of the water once and for all. When we see disability being connected with pregnancy without it being in the context of 'irresponsibility' or 'risk' we will know we have moved on a bit.
But, like I said, these ads are a start and and a start is way better than nothing.
Disabled people have sex too you know? blimey so thats how I ended up with all these kids? 
On a purely 'do I think they are funny' level, I don't. They are crap adverts IMO.
I don't think they would have been made without a disabled actress. I have never seen an advert with a wank joke in it. Artful, prentious sexual references yes.
But there is no way they would cast a advisably disabled actress in one of those perfume adverts. They want those adverts to be sexual, sexy, sensual, not jokey and smutty.
That is why I don't think these adverts are about normalisation. They are a gimmick.