When it comes to rushing, Zerg are practically synonymous with fast, low tier units such as Zerglings.
They even caused the popular term zerging to be invented as a result of their influence in pop culture! But the question remains; does a 6 pool Zerg rush still work as well as it used to? Or has this old school cheese become a tired strategy that everyone expects and no one gets beaten by anymore? Here are the reasons why I believe it isn't nearly as effective as it used to be.
The most obvious reason why a 6 pool Zerg rush isn't nearly as effective as it used to be is because it is such an obvious StarCraft 2 strategy! Practically ever player you get in a game with warns you about it right at the very beginning when encountering a zerg opponent.
Watch for the zerg rush! It's so incredibly obvious that someone will try it if there is the opportunity to in most games.
Another reason why a 6 pool Zerg rush is less effective than it has ever been is because of balance improvements between StarCraft 1 and StarCraft 2.
Other races are faster and can wall off a base entrance more quickly now than they originally were, so bringing in your units early means you are likely to encounter quite a bit more of your opponent's units as well.
Finally, one of the most important reasons why a 6 pool zerg rush isn't nearly as effective as it used to be is because of the workers! Workers in StarCraft 2 are now a lot more aggressive and powerful than they used to be, so you can practically counter a 6 pool Zerg rush with your workers alone.
This makes it relatively ineffective compared to other more advanced strategies.
Keep this in mind before throwing your cards on the table with a 6 pool Zerg rush!