I agree.
.INFO is generally not good for abbreviations, imho.
.BIZ is better, but .BIZ is more of a B2B proposition which many resellers don't seem to appreciate.
At the end of the day, its really the business scalability of the 3 letters in the combo. I figure at least 90% of the combos don't scale well to the generic market. And what people are willing to pay at this point in time.
icp.info, for example, scales well. But they want $1,000. No way. It's nonsensical without branding efforts.