MIT-Mobile/MIT-Mobile-for-iPhone — pull request #115 by Smartcop (2014-08-26 15:43:45+00:00)
Title: if there is already a cell present the estimated height will be that actual height

Coming back from Story Detail would take a long time because it had to calculate all the heights of the cells.
"Estimating" the heights makes the Category View List come back much faster.