Possible Clues:

• Texter's "Here's a thought"
• Texter's "Frankly ..."
• Text qualifier
• Short and modest "I think ... "
• "not that u asked, but ..."
• "If you ask me," online
• Disclaimer letters
• Online qualification?
• Texter's "The way I see it ... "
• Texter's "I'm no expert, but ... "