This is from a while back, removing the names to protect the innocent:
Matt,
My name is with F5, and I'm contacting you in regards to case . I left you a voicemail.
iControl is not supported by F5 Network Support, and is not covered as part of your support contract. If you have any issues with iControl, you should post them on the forums at http://devcentral.f5.com, as the developers of the iControl API do watch and assist with users having issues with the API.
A brief mention of this is made in the Scope of Support document located at http://www.f5.com/pdf/customer-support/guidelines-and-policies-ds.pdf, under the iRules support section.
I apologize that I can't be of more help, but all iControl support has to go through Devcentral. Thank you for your understanding.
So yeah, it's hit or miss. And you usually do have to escalate stuff. Anyways, bottom line is devcentral is the best place to get help and the F5 support model around iControl is inconsistently understood internally at F5. I pretty much think all the support guys dread getting an iControl case and instinctively schluff it off.