Oh man, yes. I've had that exact exchange so many timesOne additional benefit: When the guitarist (or anyone) starts saying "We usually play that song much faster/slower" I'm able to end the argument because I write down the tempos we decide on for each song. I then program them into my metronome, so I keep track of it all.
Frequently, the discussion goes like this:
Band member- "Wow, that seemed fast. What tempo was it?"
Band member- "How fast were we playing it last week?"
Band member- "Oh, okay. Sounds good!"