I just noticed the same thing happening in my yard! I have some
flowering quince blooming for the first time this year and as I was
pulling back the long dead grass that had sort of mulched it over
the winter and wasn't allowing me full access to the view of the
blossoms I also noticed there are more worms, and the soil is very
rich and black from the castings. There are also lots of new shoots
this season -- which is great because I want this to grow up and
form a nice privacy hedge and wild bird habitat.
I have several plantings of smaller shrubs that didn't get weeded or
well tended last season and all of them are much better for it this
season. The long grasses have fallen over and seem to have
protected the plants from the harsh winter winds and at the same
time fed the worms.
Maybe this season the weedeater won't get used at all <G>,