„Is all this really a problem?
Probably . . . Not. Most people who arrange to fully stealth port 113 never have any trouble connecting to any remote servers they commonly use. If, after stealthing port 113, you do experience connection delays, such as when sending or retrieving eMail, you’ll know it immediately since it’s usually quite apparent, and you’ll know that your ISP is using an IDENT-dependent eMail server. (But this is not common.)”