Update
OK, so while the following solution doesn't result in the CPT's being listed in the JetPack admin sharing settings, it does mean that when you create a new CPT post entry the Sharing Metabox is enabled, with the "Show likes" and "Show sharing buttons" check options:
http://wordpress.stackexchange.com/a/13336/31446
(If you look under the jetpack plugin folders, you'll see that sharedaddy is the sharing sub-module).
PS - Also note that although the options are shown under Sharing settings for the Pitch CPT's, toggling those check boxes doesn't appear to do anything