[thomasbk]

Part of this is somewhat similar to how Windows 8 measures "Start-up impact" of applications that auto-start, and allows you to disable them with two clicks. (In task manager)

[sp332]

Internet Explorer will even tell you how long each plugin takes to start. You can see the stats in [Gear icon]-> Manage Add-ons. My slowest plugin is actually Google Chrome Frame :p

[fooqux]

I'd say that, given the scope of what that plugin is doing, a slow startup is not exactly surprising, and is rather expected.