[quote]They also have the most predictable builds. [/quote] This isn't much of a Con against Zerg. Yeah Protoss/Terran can predict that Zerg is obviously going to either Broodlords or Swarm Hosts, but they don't know which until they see those units, and in order to tech switch to something that can counter those units (and all counters suck at countering them) will cost more money than the Zerg having Swarm Hosts or Broodlords. The obvious counter to Broodlords for example would be to go Sky Terran, but by that time Zerg already has a shitload of Corruptors, Zerg can just shoot everything out of the sky.

[quote]but they don't know which until they see those units, and in order to tech switch[/quote] You shouldn't have to tech switch in the first place if your scouting is good. Also, a macro zerg going for Brood or Swarm can be vulnerable to early/mid harrass. I like [url=http://wiki.teamliquid.net/starcraft2/2_Rax_Reactor_Hellion_opening_(vs._Zerg)]2 Rax Reactor Hellion opening[/url] when I play TvZ. You can also slide into early Banshee pressure if he's skipping Spore Crawlers. I like Banshee's vs. a 3 Hatch (1 natural) because generally they can't get all 3 Spored before your first two banshee's. I've also gone TechMech 1-1-1 into Siege Tanks to counter [i]Baneling Busts [/i]and [i]Roaches[/i], though you really have to watch for a the inevitable Muta-ball around 11-12 minutes. (Well placed Turrets in your line can help) Check [url=http://www.youtube.com/watch?v=dEt0XeVk2g4]Bomber v. Scarlett.[/url] Great example of TvZ play.

[quote]Check Bomber v. Scarlett. Great example of TvZ play. [/quote] I [i]hate[/i] Scarlett, for various reasons.