I have actually completed week 9 of couch to 5k. It has taken me approximately 12/13 weeks not 9 - one weeks rest for injured foot. Then a couple/3 of weeks of only two runs instead of three. But this week I have done three runs - the last one being a park run today. I am actually thinking of joining a running club! So I think I have graduated! Hooray
I have actually done 3 park runs over this time - and today was the fastest!
I actually don't think it matters how many weeks it takes to feel that you have completed the programme. As it all seems to build up the stamina.