No replays soz. Haven't played/watched in a while. But it is more common in larger games for a few reasons.
- lower skill
- less strategic focus
- potential to have to defend against multiple armies at once in which case light porc won't cut it
- more 'laning' behaviour which ignores the mobility of units in favor of winning a small section of the map
I'm not sure if it's something worth worrying about though. There also tends to be more artillery and striders in team games.