It’s a question we all face – what’s a reasonable tip for your waiter? After all, the last thing you want is to get on the bad side of the person who handles your food. 
According to the New York Post ,  tips may be adding a bigger chunk to your bill. Waiters in Manhattan now want a 25 percent tip, and some New York City restaurants that print  “suggested gratuities” even present 30 percent as an option, the paper reports.
It’s not just wishful thinking – waiters are starting to get it. A study by Cornell University consumer behavior professor Michael Lynn, who examined 9,000 credit card receipts from a Poughkeepsie, N.Y. restaurant, found that more than a third of diners left tips greater than 20 percent.
Is 25% the new standard for tipping? Depends where you eat- http://bites.today.com/_news/2012/09/19/13967515-is-25-the-new-standard-for-tipping-depends-where-you-eat#comments 
Wow! 25% seems a bit high! How much do you generally tip your waiter/waitress?