When Grouping on an Integer value, the groups are not ordering correctly. i.e. if you group on values {864, 1455, 1494}, the actual order comes out as {1455, 1494, 864}. Ordering on the same data, but converted to a string and padded to the left with zeros resolves this issue.
It is possible to have "{4} | Page {0} of {1}, items {2} to {3} of {5}" (all 6 parameters) for PagerTextFormat, but not just "items {2} to {3} of {5}".
Using EnableTimeIndependentFiltering with a DatePicker works very well but I would like to see a EnableDateIndependentFiltering property. Can date independent filtering be added to the time picker control in the RadGrid? As it is now you can add a time picker filter column but it does not filter properly since it looks at both the date and time portions of a datetime field.