nope. that is 1 min outside per customer, tops. that is not tip worthy, especially if they have an attitude. now that i know that they get minimum wage at least and possibly more, that only further solidifies the action of not giving a tip.
Servers at restaurants are a different story, they deserve a tip according to the level of CONTINUOUS service they provide you. for min 30min that you are seated in the restaurant, they are to cater to your needs and make sure your experience is an enjoyable one and you would want to return. if you like the experience, you are going to tip more. they constantly ust check on you and make sure you are set on drinks and you like your order. And they do all this while getting paid less than federal minimum wage
At sonic, that does not happen; its a short-order diner that made the dining room your car. they do not check on your needs, they only attempt to fix it if YOU go out of your way to complain. If you notice the sequence of events at a sonic restaurant, it happens something along the lines as this.....
(Traditionally)
1. You pull up in your ride at an empty stall and think about what you would like to order.
2. When ready, you roll down the window or lean over (if windows are not present) and press the non-illuminated red button; which if working properly will then illuminate when pressed.
3. When the voice on the other end answers the request, you then place your order according to your liking. The voice then verifies your order and asks if you would to order additional items. This process can be repeated until both parties (Sonic and the customer) come to an agreement on the order. the Sonic voice then informs you of the amount due on the order you just placed.
4. At this point you have choices. You may use plastic to complete the transaction before the food is brought to you via the card device attached to menu and ordering system. You may push the button again to modify/cancel your order. Or you may gather sufficient cash & coin to pay the carhop when the food is brought out to you.
5. The car hop ventures out to your stall, they greet you and then verifies your order while handing it to you. You either confirm that is indeed your order, or then make known the error(s) and the carhop then corrects the mistakes (or at least tries to). When both parties are in agreement that the order is fulfilled, the carhop will hand you a receipt if you paid via card system, or repeat your total amount due, which at that point you provide sufficient funds.
6. If change is needed, the carhop provides the correct amount at that time. Process is then complete.
Note that in the average sequence of events, you only interact with Sonic employees twice during the entire process... once when you place your order through the menu stall; the other being when the carhop brings your order and if needed, funds are excahnged. Now when in that process, does the carhop, who only has a minuscule part in the entire process, should they deserve a tip? if a tip is to be given at Sonic, it should be to the cooks who have to juggle many orders at one time and get it right the first time.
With this long long tirade, remember that Sonic is a fast food restaurant (Short order cooking) and transfers the dining room to your appropriate stall outside the brick and mortar building. it is essentially a 50's drive in diner with less service and interaction.
no tip is needed for such a lack of service