Lunch time at the Whispering Canyon Cafe tends to be just a bit more low-key than dinner, especially if you go late in the dining period (between 2:00pm and 2:30pm for example). The restaurant is the Wilderness Lodge's only "non-signature" table service location and is located on the interior first floor of the resort.
The wise-cracking wait staff "sassing customers" is part of the show at Whispering Canyon Cafe, which usually plays better when the restaurant is full and not so much between shifts, so you can plan your visit accordingly.
The food here is mostly "American West Frontier Fare" and many guests go for the All You Care to Enjoy Skillet that includes quite a few meats (ribs, roasted chicken, sausage, etc.) and trail wagon accompaniments like mashed potatoes, corn on the cob, and baked beans.
There are some a la carte items on the lunch menu though. Most are sandwiches that also fit the theme, but some (like a burger and "Mediterranean Chicken Sandwich") are more for those that don't want to eat "western".