I think by math he means the actual lessons, not the cost. Calculus is the same everywhere, but you meet different people.
Not all CS masters are equal. Not all CS instruction is equal.
Depending on these outcomes, the cheap masters in CS could be superior to a local, more expensive, in-person community college masters.
Sure, the faculty at an Ivy League can make all the difference. So can the faculty at a top-tier school like GT.
But will the faculty at Ye Old Community College make all the difference and warrant the 2-4X higher cost?