1. A method for glitchless delay value updating in an elastic interface system, the method comprising the steps of: sampling a data bit off a data bus by a functional sampler, wherein the data bit is loaded from a functional sampler output into a FIFO input; tracking a guardband characteristic using an alternate sampler; determining whether a functional sample point needs to be adjusted, wherein changing a delay value from an old delay value to a new delay value results in adjusting the functional sample point; loading the old delay value into the alternate sampler; and temporarily ceasing to load the data bit from the functional sampler output into the FIFO input and, instead, loading the data bit from an alternate sampler output to the FIFO input.