I heard that c section will likely leave mummy with a muffin top. Is that true?

All my 3 deliveries were c-section and I think it really differs from mum to mum. After my 1st child, my tummy went back to normal after 1 to 2 months. After my 2nd child, I noticed that it didn't go down that fast. And not completely flat too (meaning a little bit muffin top) And after my 3rd child, it has been 1 year since I last delivered and I do have a little muffin top...hehe...but I think if I do some toning exercises, it should go down. :p