Would be nice to have RadGrid offer the feature to have options to Merge Cells with same contents so the report/grid won't be so busy. Users typically expect this kind of look and feel. 

Example & code included:
    http://www.marss.co.ua/2010/01/how-to-merge-cells-with-equal-values-in.html

This ticket discussed it also: 1091013

Others in forums asked about this also in the past since about 2009, if we google on: telerik grid asp.net merge cell. .
http://www.telerik.com/forums/problems-with-merge-row-in-radgrid

http://www.telerik.com/forums/merge-cells-by-column

http://www.telerik.com/forums/merge-rows

Then I found this link among the results from google. Though, I wish there are RowMerge and ColumnMerge properties in RadGrid for us to turn it on/off. That will be wonderful.

http://www.telerik.com/support/kb/winforms/details/radgridview-merge-celss

This example is also from the following link from the same google search result, the first link.

http://www.telerik.com/forums/merge-cell-in-radgrid

Thanks.