Yes, I can understand that. I have been part of the outsourcing industry for 12+ years now and I have personally seen clients losing interest and trust due to delay in communication.
Turn around time is extremely important for us. And specifically for that reason only we have assigned a Project coordinator (check our pricing section (1)) for communication purpose on our pricing page. Right from the beginning.
I can assure you that turnaround time won't be an issue. We will try to answer you as quickly as possible once we are in receipt of your message.
It means that on a working day and time, we will try our level best to answer you within 30 minutes of receiving your message.
(1): http://xpditesolutions.com/hire-development-teams.html#Price