Row count int sys.dm_exec_query_stats

SQL 2012 has added 4 new columns 

total_rows,

last_rows,

min_rows,

max_rows  in sys.dm_exec_query_stats DMV

This will help us to find the queries which are returning large number of results and we can optimized them 

SELECT QS.*,

       Substring(ST.text,

                        ( QS.statement_start_offset / 2 ) + 1,

                        ( ( CASE statement_end_offset

                           WHEN -1 THEN Datalength(st.text)

                                                      ELSE QS.statement_end_offset

                           END - QS.statement_start_offset ) / 2 ) + 1) AS statement_text

FROM   sys.dm_exec_query_stats AS QS

       CROSS APPLY sys.Dm_exec_sql_text(QS.sql_handle) AS ST

ORDER  BY max_rows DESC