not sure if app init module is working or not

Downloading and installed the app init module for IIS 7.5 (Windows 2008 R2).

Ran the following script on our asp.net MVC 4 web apps:

appcmd.exe set app "Default Web Site/signin2" /preloadEnabled:true

appcmd.exe set app "Default Web Site/zfp" /preloadEnabled:true

They still seem slow to load after an IIS Reset.  How can you tell if IIS init module it is configured and working properly?  Note, we are running two node Windows NLB cluster.