Close combat - more stunning

In my last campaign, I had a character (Byrn's) and an NPC in a lift having a fight. The stun clocked up It was soon aparent that a fight between two average characters might take a while. Here's the mathematics.
Average Human Character (without Street Fighting Skill):
Battle: 3 - therefore 2 close combat moves a turn
Meat: 3 - therefore, 80 stun
If the average person kicks once and punches once per turn, that does 3 (Meat) stun for the punch and 6 (2 x Meat) stun for the kick. 9 stun. Therefore, in the best scenario, it takes 9 turns to knock someone out. That's 21 seconds. Doesn't sound long realistically but in play it seems to take forever!
Most characters have combos that are not just made up of punch and kick, so it might take longer.
What I was thinking was doubling the stun done by a kick and punch, reducing this time in half. It means a very capable close combat character (5 moves, 10 meat - 40 stun per kick) can punch out just about any human in a single turn.
What do you think?
Average Human Character (without Street Fighting Skill):
Battle: 3 - therefore 2 close combat moves a turn
Meat: 3 - therefore, 80 stun
If the average person kicks once and punches once per turn, that does 3 (Meat) stun for the punch and 6 (2 x Meat) stun for the kick. 9 stun. Therefore, in the best scenario, it takes 9 turns to knock someone out. That's 21 seconds. Doesn't sound long realistically but in play it seems to take forever!
Most characters have combos that are not just made up of punch and kick, so it might take longer.
What I was thinking was doubling the stun done by a kick and punch, reducing this time in half. It means a very capable close combat character (5 moves, 10 meat - 40 stun per kick) can punch out just about any human in a single turn.
What do you think?