Both my neighbor's St. Augustine and my Bermuda grasses are still completely dormant. Some of it is a bit "crusty" to the touch. That's the mold growing on bare soil with absolutely no shade. Those clumps shielded somewhat by the dormant grass leaves or perhaps de-foliated oak trees is soft and yes, if you walk on it, it is slimy. There is absolutely no water issues. Both yards are on gentle slopes with practically no top-soil. We are on a hill of clay. Rain cannot penetrate the clay and thus the rain-water (plus irrigation in the warm months) quickly drains down-hill.
I call it Slime Mold simply because every lawn and tuff expert says that is what I have. They are all going by the pictures you saw.
