That seems odd, unless your DataTable has an extraordinarily large number of columns or you are running additional processing on the data or the visualization, in theory IE should have no problem handling 1500 rows. I'm in the process of building a Table visualization with a multiple O(n) algorithms that must be run on every click the user makes on the table, and IE < 9 is noticeably slow (5-10 seconds per click) on a table with 3000+ rows (IE9 has no problems with this), but nothing like what you are describing.
Which visualization are you using (I assumed Table, but maybe I read you wrong)? Are you doing any other processing? Are you fetching the data via AJAX? If so, is it slow fetching the data or slow rendering the visualization?