Because they learned long ago not to disapoint without telling Wallstreet in advance. It is as simple as that. Any reputable company today will announce before earnings if they are coming in short. Dell may tell us that tomorrow but not likely. I am also sure at this point that Dell is holding in reserve what is permitted by the SEC so that earnings projections will be met.
What is going to move this stock will be the top line. This is of course just my opinion, but Wallstreet knows Dell is going to squeeze more money out of every dollar they make than anyother hardware maker. Wallstreet wants to see the top line. If Dell has continued to take market share (we know they have) and revs are increasing at an acceptable rate (not sure what the street wants to see)they will continue to reward this company.
Anyway for what all of that BS is worth. I am still positive Dell will make the .17, and the way the stock has been moving sideways, this should still give a bounce.