this issue has been touched on here if i'm not mistaken, although a cursory search has not located it.
Quote: from Felonius on 10:39 pm on Oct. 29, 2001
In the past I have just tipped the usual 15-20% on the entire tab, and more than this if I brought my own bottle of wine to make up for the difference. Am I over-tipping? Do other folks out there tip less incrementally on high dollar wine purchases?
i had good service just tonite at a BYO. the total tab was about 30 dollars. the waitstaff was attentive to the wine i brought. i'd usually throw down 6 as a tip, but since they serviced the wine, i tipped 8 and change. not much of a difference, but instead of 20% it was closer to 30%. not a lot from me, but for them it adds up.
with that said, if a BYO provides no wine service besides bringing out glasses, that rule goes out the window.
as far as tipping on 跌 bottles, that's a different issue, and one that i have given much thought to, although on the rare occasion that i spend 80 or more on a bottle of wine (well, i should say 2 or more at 80 bucks, as that starts adding up), i won't tip ภ a bottle. and i certainly wouldn't tip 60 on a 300 dollar bottle...although in those rare situations it's usually on an expense account and it's not my money anyway.
i don't think there's any such thing as "over-tipping". tip what you're comfortable with. the notion that there is a correct amount to tip seems to be defeating the purpose.