I honestly think that's an easter egg. They put that line in refering to just that, Butch for Fo3. After all, he does steal your sweetroll...
No. The Fallout 3 reference is itself an easter egg.
It goes back to Morrowind, where what you would do with if a bunch of bullies took your sweetroll is one of the introductions questions to help decide your character's class.
It is also an easter egg in Oblivion when rumors comment on someone stealing their sweetroll and... (the dialog trails off without an answer)
It may go back even further than Morrowind but I haven't played Elder Scrolls games before Morrowind. But I think the Morrowind reference is the genesis of the Sweet Roll easter egg.