That is a bold claim, that needs backing up. As far as I see, the reason it took significantly longer to crack Go than chess is that latter is a western game, and the other is not, and thus early computer developers were significantly more likely to know about and thus inclined to tackle chess than they did Go.
Looking at it from a similarly biased metric, I could point out that it took decades to figure out how to program a chess AI, but the Go AI was developed in years instead. It also doesn't tell us anything about which one is "more strategic" because the reality is that AI techniques were originally targeted pretty much exclusively at chess to the exclusion of everything else, and only when chess was "beat" (or close approximation thereof) was a significant amount of effort pointed at Go and other games instead.
Grey Wolf