Hardly. Average speed for the Paris marathon is about 6mins/km or 10kph. And that's people fit enough to be able to actually run a marathon, most of whom have substantially trained for the event, so not the average joker off the street that prepped for "a couple of months".

The fastest female runners are running at 18kph. That's Olympic standard. The average female marathon runner runs at about 9.3kph.

Only competitive male runners would be capable of beating that pace.

Edit: Disclosure - female, and I run a half marathon in two hours That's 10 minutes faster than the average woman and around about average for the entire field. To achieve that time I play an active sport, and train for longer running events (I'm the fastest long distance runner in my sports club). In kph I manage a bit less than 11, which is a long way off 14kph.