Chris (Tweeterguy) is absolutely right.  

The good news is that with the newer systems out there they are all built to handle "whole home" in a much more efficient way (similar to what you would be used to in a programming environment but still not programming).  This makes it about 10x-100x faster to make tweaks, additions, etc... 

Example: if the same system was built with one of our URC Total Control systems, changing a DVR for me would be less then 5 minutes of programming... not only that, but as your installer I have remote access to reprogram (you just need to go into the remote and set the "Offsite Option" to "ON") so I wouldn't even need to come to the house.

Hell even with Savant I would be able to make those kinds of changes quicker and more reliably - but generally you do pay more upfront so the balance (and overall cost savings) can be hard to see for many customers at the time of purchase.