Squeak.
Within the first 5 days of make, Ellsworth plain curds produce one of the loudest, cleanest squeak signatures in the Wisconsin category. The squeak is audible without effort and persists through the entire bite cycle (initial bite, chew, swallow). At room temperature (the appropriate test condition), the protein structure is firm enough that the squeak survives even after the curd has begun to warm.
The squeak fades on schedule. Day 7-8: still present but quieter. Day 10+: largely gone. This is the appropriate behavior; cheese curd squeak is a function of fresh casein matrix structure, and the structure relaxes with time. A curd that still squeaks loudly on day 14 has been engineered, not made.