Gator Guy, definitely yes, if the amount of water is not carefully controlled. This is just my observation, but if the timer is set for too long a period and the system puts out too much water, there can be light stripes, though not that noticeable. Another plus with this system is the way the grass grows so thick and lush. (Only disadvantage here is mowing is a little more difficult).
I haven't tried hooking my inline fertilizer bottle to the system (really for the roses), but may try it sometime, not that the grass really needs it.
Again Gator Guy, I'm not disputing any members word or experience, or results of any tests, but I can take a photo of the yard, or anyone could drive by and look at it.
The funny thing about it too, I just used a sharp pick and dragged it along the ground in order to create my 'trenches'. The lines are only about 2" deep. I also have an air relief valve and check valve at about the mid point of the system, which is right at the highest point.
Again, I applaud you on your initiative and work to bring a great site such as this online; there's so much information and disinformation on the 'net regarding drip, and a site such as this surely helps with so many experienced and knowledgeable members, plus the opportunity to ask questions, as stupid as some of mine might be
!