You're right. I meant quanta pile of ten or less, not quanta pile of 30. It's common for them to be able to play a creature just because you can't use your Quicksand until the third turn and on average you'll only have 1-2 Pests in your first couple turns. But hopefully, after that third turn, their small pile should be shrinking.
Of course like all things though, it depends on the draw.