8. The method of claim 5 wherein the predicting of expected quantities of future textual comments for the multiple future time periods includes matching the determined quantities of identified textual comments for at least some of the prior time periods to a first portion of a defined template representing changes in quantity over time, and determining the predicted expected quantities for at least some of the multiple future time periods based on information from a second portion of the defined template.
8. The method of claim 5 wherein the predicting of expected quantities of future textual comments for the multiple future time periods includes matching the determined quantities of identified textual comments for at least some of the prior time periods to a first portion of a defined template representing changes in quantity over time, and determining the predicted expected quantities for at least some of the multiple future time periods based on information from a second portion of the defined template. 9. The method of claim 8 further comprising generating, by the one or more configured computing systems, a first histogram to represent the determined quantities of identified textual comments for the at least some prior time periods, and wherein the defined template includes a second histogram based on prior actual quantities of textual comments received, and wherein the matching of the determined quantities for the at least some prior time periods to the first portion of the defined template includes matching the first histogram to a subset of the second histogram.