I was thinking some more on this, and am probably going to make a very ageist comment here, but anyway:
Her new programme reminds me of how my Mum now cooks for most of the time. My Mum is a pretty good cook, she never really loved it, but made some lovely meals over the years.
Now that we are not at home and there are no children to cook for, and they have more disposable income, a lot of her cooking is a combination of prepared food and fresh ingredients often from Marks.
She knows how to cook, so can work out how combine things, how to cheat in other words to make quick meals for her and my Dad, as she says "I just can't be bothered any more"
Now I know that a/ Delia doesn't have children so no empty nest syndrome b/ always had a lot of disposable income BUT, I wonder if this is the age group that she is aiming it at? Women of a certain age who have cooked all their lives and just can't be bothered any more