First, I apologize for the delay in response time to your inquery. I’ll be glad to assist you. Jetpack is compatible with our themes, so I’m unsure as to why you were told otherwise by the Jetpack team (we even use Jetpack on almost all of our demo sites). Were they able to elaborate at all, or did they give you any additional information you’re able to share with us?
I recommend following the guidelines within the post, which was written by our own Organic Themes theme developer, David Morgan. After reviewing those recommendations, please let me know if we can assist with anything further. I would also advice reaching out to your hosting provider regarding any additional support they could offer to increase site speed.