Posted 2012-May-27, 21:56
I think the idea about GIB being the "purest test of bridge skill" isn't that GIB is so good, but that it's the only way to equalize skill of the opponents, and your partner. Even if GIB is buggy, it still accomplishes this task. People who consistently do well despite being partnered by an erratic robot are very likely better than those who don't.
I do think GIB tourneys are reasonable tests of declarer play skill overall. What is untested a lot is defensive skill, since GIB doesn't understand signalling, and bidding judgment/skill in complicated auctions likely to hit a bidding hole in the database, you can't bid perfectly when your partner refuses to cooperate.
And even though I make a ton of complaints about GIB, the reality is that for every bug I report, there are dozens of boards where it bid fine, played OK, and nothing really to report. The instructions on this forum for "one thread per bug" encourage the high thread count here.