I only leave a big tip for a big top when the service was exceptional. Or if she was legit flirting with me, and then my number is written on the receipt, too. Hasn't worked yet, but it's never gotten me slapped or asked to leave, either.
I tip on service first & foremost. However, tips can be based on additional factors. Personality is a factor. Another includes; the more she shows me, the more (cash/tip) I show her. Hey I'm just being honest.
Its not just bigger boobs but also how you dress act look.If this decoy waitress was old and ugly she probably wouldn't have even received as many smiles.
if she is making you hot, she can cool you off...(this is that same gal, Kari Byron) typically, i do not tip a coffee shop worker. the tips jar is not required, it's an added feature for the workers. generally, i could care less on "size" as i treat all servers with a 20% tip. BUT if the service was terrible, i leave nothing. that' been my "MO" for decades.