Just got back from Kirko. The quality was okay but the tab was MORE than my average Mori tabs. On this recent visit, the kurodai was good, as was the spanish mackeral. The torched barracuda was very good, the one item better than Mori's. The kanpachi was also delicious. However, the shimaaji was pretty tasteless, the kinmedai was torched and tasted of acrid smoke, and the blue fin tuna and toro were very mediocre. Sweet shrimp was only minimally sweet and the lowest quality sweet shrimp I've had in a while.
Overall, I would say the entire visit was a bit disappointing. The only saving grace was the amazing shirako. It was creamy, utterly fresh, and the sac having that slight crunch. Delicious. As luck would have it, I sat next to someone who works at IMP and he informs me that it is now shirako season and that it is usually available at Kiriko on Tuesdays and Fridays.
The price tag makes it hard to justify going to Kirko over Mori though...sublime shirako or not.