I originally ordered my new cars in March and changed my car for years at the start of June, which gave me half of the summer months to enjoy my new car, However I had a three month delay in 2009 when Vauxhall had a problem getting Insignia’s and I did not get my car until October just before the winter was due to set in. On top of that my Father was buying my 3 year old Citreon C4 from Motability, so he had to get a car which was another three months older, without Motability reducing the price of the car, even although I was still paying my DLA allowance during that time, for an older car.
So yes I think it matters, especially if you have extended it for the five years and also especially if you the driver, are the disabled person and your condition does change. It may matter less to people who are not disabled but are driving a disabled member of the family’s Motability car.