EITCL,

I am having the same problem with one of my larger reports on SSRS 2008 R2, but when I work through your example I am not seeing the expected performance lag. Therefore here are my questions:

What version of the BID client tools were used to develop the example report? (Reason: When working with MSFT in the past, I believe they mentioned something about an issue with the keep together option and converting SQL 2005 RDLs to SQL 2008 R2. The bad conversion could be causing your IE browser to eliminate IE 5 browser.)

Have you applied any CU patches to your SSRS server? (Reason: I think CU3 has a fix a parameter bug KB#2276203.)

Can you post the RDL file?

What version of SQL is your data source connecting using? (The TSQL has to run on some platform.)