Performance Issues on Insert Into Partitioned View

I have a Partitioned view which is a UNION ALL of the last 14 days of batches created from my database. For each day there is a range of batches.

A sample DDL of a table:

CREATE TABLE [batchResults_20040428] (
[batch_id] [int] NOT NULL ,
[list_id] [int] NOT NULL ,
[subscriber_id] [int] NOT NULL ,
[status_id] [int] NOT NULL ,
[daterefered] [datetime] NULL ,
[referal] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[datecreated] [datetime] NOT NULL ,
PRIMARY KEY CLUSTERED
(
[batch_id],
[list_id],
[subscriber_id]
) WITH FILLFACTOR = 60 ON [OEN_ARCHIVE_ACTION_2004_04_15] ,
CONSTRAINT [CK_batchResults_20040428_check] CHECK ([batch_id] >= 13220 and [batch_id] <= 13367)
) ON [OEN_ARCHIVE_ACTION_2004_04_15]
GO

Every day at midnight a new table is created and added to the view, and the oldest dropped from the view.

The table is created with FILLFACTOR = 60 in order to allow a big amount of rows to be inserted.

I am having issues when inserting into the view with a statement similar to:

INSERT INTO batchresults
(batch_id, list_id, subscriber_id, referal, status_id, datecreated)
SELECT batch_id, list_id, subscriber_id, referal, status_id, GetDate()
FROM batchresultsqbuffer
WHERE action_id = 5 AND deliverystatus_id <> 2

If I dump the resultset into an empty table it will fly. But inserting into the view is taking between 2 and 7 minutes per 50~200k rows.

This is a sample of a table SHOWCONTIG

DBCC SHOWCONTIG scanning 'DeliveryText_20040621' table...
Table: 'DeliveryText_20040621' (967674495); index ID: 1, database ID: 7
TABLE level scan performed.
- Pages Scanned................................: 423672
- Extents Scanned..............................: 53176
- Extent Switches..............................: 398817
- Avg. Pages per Extent........................: 8.0
- Scan Density [Best Count:Actual Count].......: 13.28% [52959:398818]
- Logical Scan Fragmentation ..................: 47.66%
- Extent Scan Fragmentation ...................: 0.48%
- Avg. Bytes Free per Page.....................: 2749.8
- Avg. Page Density (full).....................: 66.03%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.


Any feedback will be appreciated