On the new version released by Thomas (1.3.11), Procedure List is very slow on big units, compared to 1.38 release. It's pretty easy to compare. Just open Procedure List on System.Classes.pas on each version of GExperts and compare the time it takes to open the list.
Fixed. Removing the "nasty hack" added about 2 seconds (on my computer) until the dialog was been shown (That change was already done for version 1.3.10). So I re-added it again.