I tried a script from PinalDave - Look at this! Here are the top ten queries:

MaxElapsedTimeAvgElapsedTimeLogCreatedOn

358497204826520494/8/2014

2855344316823810/18/2013

2853692221863110/18/2013

23460331852110/18/2013

23437700562687010/18/2013

204691007614910/18/2013

17853331153638082/26/2014

14070434783025910/18/2013

8880477932390210/18/2013

646335968180863/15/2014

SELECT DISTINCT TOP 10

t.TEXT QueryName,

s.execution_count AS ExecutionCount,

s.max_elapsed_time AS MaxElapsedTime,

ISNULL(s.total_elapsed_time / 1000 / NULLIF(s.execution_count, 0), 0) AS AvgElapsedTime,

s.creation_time AS LogCreatedOn,

ISNULL(s.execution_count / 1000 / NULLIF(DATEDIFF(s, s.creation_time, GETDATE()), 0), 0) AS FrequencyPerSec

FROM sys.dm_exec_query_stats s

CROSS APPLY sys.dm_exec_sql_text( s.sql_handle ) t

ORDER BY s.max_elapsed_time DESC, ExecutionCount DESC

GO