“In 2008, Super Tuesday was Feb. 5 and included the following states: CA, NY, MA, IL, AZ, NJ.”
In 2016, Super Tuesday was Mar. 1 and included the following states: AL, AR, GA, OK, TN, TX, VA. Notice anything different from your 2008 list?
“On that date, 20 states had voted by that time.”
On that date in 2016, only 4 states had voted by that time. Again, a big difference.
So the frontloading was actually twofold — (1) a moved up Super Tuesday to occur when less than a handful of states had voted, and (2) weighted heavily to the South where Clinton’s name recognition gave her a powerful advantage.