Is Mary Portas right? When donating clothes to charity?

Should you wash iron them, and not bring them in in a black bin bag? Also she says the clothes should be of top quality. When she was doing her Mary Queen of Shops show she went to British Gas HQ and asked for donations for the shop she was in. People bought in new clothes from Top Shop, still labeled and she also got a few designer handbags! Does the word charity not mean anything to her?