Speed up the localization of dynamic strings

I noticed that the English UI was considerably slower than the other languages when switching between pages (on my Linux VM it was 9 seconds vs. 3 seconds in debug mode). The slowness was due to the fact that L10NSharp processes GetDynamicString() differently if the language is English.
Phil, can you give us a feel for how clear it is that this can go away, and what testing you were able to do to verify that removing it will not cause any change to the existing localization? Thanks.