It might just be age related, but I would definately say that scrapes and bruises DO take longer to heal than they used to. I was diagnosed about 12yrs ago and I am certain I healed quicker way back then... I'm 68 now so that could also be a factor.
Diabetes is said to slow down the heeling/recovery time from cuts, bruises and other trauma to the body.
On a personal level I seem to heal quite quick, split my finger end open last week with a knife and today it's barely visible, even as a child I would recover in a short space of time compared to my siblings.