I drove the Slate truck. Its toy-like looks hide a surprisingly serious pickup.

Slate thinks America needs a lower-cost truck. I expected it might feel cheap and crashy — but it didn't. Ben Shimkus/Business Insider Only a few people have actually driven Slate's truck. I became one of the latest drivers on Tuesday. It feels surprisingly truck-ish and drives even better than its specs suggest. Slate is betting that the market left several gaps wide open for a new competitor. Are they right? Cheap cars typically suck. Consider the Mitsubishi Mirage. During its final decade…