IIS: staticCompressionIgnoreHitFrequency does not work at a web-site level

I am trying to delegate staticCompressionIgnoreHitFrequency IIS configuration attribute to a web-site level, so my users would be able to manage this setting independently. I changed my applicationHost.config as follows:

1. In the <configSections> section in the system.webServer group, I configured settings for httpCompression element as follows: <section name="httpCompression" allowDefinition="MachineToApplication" overrideModeDefault="Deny" />
2. Then I moved the whole httpCompression section from <system.webServer> into <location path="" overrideMode="Allow"> section.
3. Then I configured httpCompression attributes: <httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files" staticCompressionIgnoreHitFrequency="False" lockAllAttributesExcept="staticCompressionIgnoreHitFrequency">

In a web.config file at a test web-site, I added the following after the <system.webServer> element: <httpCompression staticCompressionIgnoreHitFrequency="True" /> I restarted both AppPool and the web-site.

Still, whenever I request HTML-files from the web-site, GZIP-compression works for frequently accessed files only.