In one aspect, a method for use in connection with a content-presentation device including a first input buffer, a second input buffer, and an output buffer, wherein the content-presentation device is configured such that content from either the first input buffer or the second input buffer can be communicated to the output buffer, includes: (i) receiving, from the content-presentation device, an identifier associated with the content-presentation device; (ii) using mapping data to map the received identifier to a baseline input-to-output delay, which represents a time-period between when content is input into the first input buffer and output by the output buffer; and (iii) transmitting, to the content-presentation device, the mapped baseline input-to-output delay to the content-presentation device to facilitate the content-presentation device (a) determining an input-buffer switching delay, and (b) using the determined input-buffer switching delay to facilitate performing a content-modification operation.