Turtling Discussion

[xSkeletalx]

I've noticed a recent trend lately where a lot of my opponents force a turtle match abd just sit doing nothing until I attack. This happens when the opponent makes what looks like an aggressive push at the start, and I fall back to defend - they will then spawn enough units to stretch across the map, but sit and wait for me to push forward. This seems like a guaranteed win every time. Has anyone else seen this lately?