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Very slow replication

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I have a replication with pull subscription. over the wan.

At times it is ok (Not briliant) but sometimes it gets realy slow.

For example today, we reached 2 commands per minute!!!!

at the same time we expirianced this, I copied from the same location a 13MB file and got 120-170kb/sec speed.

So I believe the IT guy saying the line is fine. I checked for locks - none. The waits are on network and they are short ones( a few seconds at the most).

The trace shows nothing during the wait (only at the end everything gushes through)

here is the agent log:

Date  10/06/2013 22:29:01
Log  Job History (HK-DB-LSD_HK-LSD_HK_PUB-ILREP01-LSD_HK_SUB-1AA4CA8A-B1AA-4D3D-8EC6-760F707898E6)

Step ID  1
Server  ILREP01
Job Name  HK-DB-LSD_HK-LSD_HK_PUB-ILREP01-LSD_HK_SUB-1AA4CA8A-B1AA-4D3D-8EC6-760F707898E6
Step Name  Run agent.
Duration  00:26:34
Sql Severity  0
Sql Message ID  0
Operator Emailed  
Operator Net sent  
Operator Paged  
Retries Attempted  0

Message
06-10-2013 22:55:34

Total Run Time (ms) : 1592521  Total Work Time  : 1580571
Total Num Trans     : 50  Num Trans/Sec    : 0.03
Total Num Cmds      : 50  Num Cmds/Sec     : 0.03
Total Idle Time     : 0

Writer Thread Stats
  Total Number of Retries   : 0
  Time Spent on Exec        : 46
  Time Spent on Commits (ms): 0  Commits/Sec         : 0.00
  Time to Apply Cmds (ms)   : 62  Cmds/Sec            : 806.45
  Time Cmd Queue Empty (ms) : 1581352  Empty Q Waits > 10ms: 3
  Total Time Request Blk(ms): 1581352
  P2P Work Time (ms)        : 0  P2P Cmds Skipped    : 0

Reader Thread Stats
  Calls to Retrieve Cmds    : 1
  Time to Retrieve Cmds (ms): 1580571  Cmds/Sec            : 0.03
  Time Cmd Queue Full (ms)  : 0  Full Q Waits > 10ms : 0
*******************************************************************************

2013-06-10 19:55:34.432 A total of 50 transaction(s) with 50 command(s) were delivered.



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