The grid is using internally standard ScrollViewer and we will need to rewrite this completely from scratch (write our own similar to our Silverlight version) if you want to achieve something similar.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items.