Synoptic Length Comparison

I chuckled when I read this in a student assignment today:

A common argument,  analyzes the lengths of each of the synoptic writers.

I’m pretty sure that I’ve never come across an attempt to compare the lengths of the writers of the Synoptic Gospels. I don’t know how one would go about undertaking such a study, or how it would help resolve the Synoptic problem…  🙂