Cognos 11.1 dashboard performance woes

[hardstep]

Hi Folks
Has anyone seen performance issues with dashboards running in 11.1 ?.
I upgraded from 11.0.12 to 11.1 and since then dashboards are taking over a minute to refresh.
Let me explain a little more...
- Simple tabbed dashboards built against data module running against SQL Server 2016 are taking over a minute to refresh/update
- Once initialised the performance seems to be ok 1-2 seconds to changes/filters applied against the dashboard
- If I close the dashboard and reopen it I get the same minute delay
- I have caching set to automatic and have tried setting the caching to be ON and both result in the same delay
- I have tried updating the JDBC drivers for SQL Server and updating to later fix packs - to no avail.
- I've followed this URL around dashboard performance tweaking.... https://www-01.ibm.com/support/docview.wss?uid=ibm10737507&myns=swgimgmt&mynp=OCSSTSF6&mync=E&cm_sp=swgimgmt-_-OCSSTSF6-_-E

Has anyone seen similar issues ?.
Cheers
Nick

[VizWiz]

I don't have any useful information, sorry :(. But this makes me nervous, seeing as my company is planning to upgrade soon and we also use SQL Server. Please report back with any of your findings!

Thanks!
VizWiz