Questions:
1. What could the BIT demonstrably suggest?
2. What are the LAs?
3. What did the player in receipt of UI do?
4. Where the NOS damaged?
1. After the fact, we learn that the BIT-er was unsure whether 3
♠ was invitational or just competing, so it seems clear the BIT could suggest bidding on. However, East's hand is so strong opposite a raise to 2
♠ that, it seems to me, pass is not a logical alternative.
2. I would say that 4
♠ is certainly an LA. Some kind of slam try is also an LA. Asking for keycards is not an LA for me, and I would not think it would be for Barry. It would be for some players - those who are still stuck in the "bidding BW is a prerequisite to bidding slam" mindset. Perhaps 4
♦, if that shows 2nd round control.
3. Passed — i.e., chose a call which was not an LA.
4. No, they were advantaged. Maybe (see below).
I would certainly not adjust the score, as the criteria are not met.
More on pass not being an LA: East has a four loser hand, and a ten or eleven card fit with West, who has shown eight or nine losers. The partnership is clearly in the slam zone (8+4=12 losers, which means 12 tricks are likely to be possible). Also, if West is minimum, the five level should be safe.
On whether the NOS were damaged: no doubt some would argue, based on 4
♠ making at the other table (no overtricks?) that the NOS were damaged
because EW did not look for slam. I don't know about that. If East control-bids 4
♦ and West bids 4
♠, will East make another try? Probably not. I suppose East might control-bid 5
♣ for starters, but that seems a bit excessive to me, unless they're clearly playing "show aces first". So I would reject the argument here.
Aside: if it were my partnership, I would want to nail down the meaning of 3
♠ in this auction, and discuss the meanings of alternative calls as well. OTOH, I have partners who either aren't interested in doing that ("let's just play bridge") or won't remember the discussion five minutes after we have it.
I think, at the table, I would have bid 4
♦ in spite of the BIT. At IMPs, if 3
♠ is invitational, then West probably wants to bid, but he may not if it's just competing. So it seems to me that 4
♠ is suggested over a slam try, which is why I would make the slam try, pass not being a LA (which means I'm not constrained by UI to pass). So I seem to be disagreeing with Barry's pass.
Possible counterargument: bidding on at all is not "carefully avoiding taking advantage of UI", so East should pass. I don't buy it, though.