I am glad to inform you that we implemented the ability to change the url and title which are shared on the client and this is now being tested. The feature will be available in the upcoming Q1 release which is scheduled for the middle of February.
The functionality which we implemented is the following one:
1) You can use a client-side set_stringsToShare(url, title) method for the social share client object (both the parameters are optional and if null provided, the old setting will be kept). By using this method, the url/title are changed for all buttons in the corresponding social share and changes are immediately applied (even for counters for third party buttons).
2) For custom buttons (all but third party) you can similarly use the args.set_stringsToShare(url, title) method in the OnClientClicking event.
I hope that the provided information is detailed enough and helpful, in case you have any comments or recommendations, we I will be happy to hear them!
the Telerik team
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