Wendy's 

photo credit: flickr

Fast food burger chain Wendy's rules the drive-thru. The world's third-largest quick service hamburger joint completes drive-thru orders in 129.75 seconds on average, nearly 40 seconds less than the national average and 20 seconds faster than its closest competitor.

Fastest Drive-Thrus (according to the 2012 QSR Drive-Thru Performance Study)

1. Wendy's -- 129.75 seconds

2. Taco Bell --149.69 seconds

3. Bojangles' -- 171.61 seconds

4. Krystal -- 175.94 seconds

5. McDonald's -- 188.83 seconds

6. Chick-fil-A -- 190.06 seconds

7. Burger King -- 201.33 seconds 

Insula Research found that Chick-fil-A correctly filled orders 92.4% of the time. Taco Bell was second (91.2%) and McDonald's was third (90.9%). Wendy's focus on speed may be the cause of its 89.9% accuracy rate but it still beat Burger King's 83% rate. The seven companies Insula tested all showed improved accuracy rates from 2011.