Radau labai gerą paaiškinimą, kas tas IBU yra: http://byo.com/stories/issue/item/3284-hop-storage-mr-wizard.
In conclusion, the IBU was a number developed as a quality control tool. Measure IBUs in the same beer brewed the same basic way day in and day out and variations in the IBU do indicate that something has changed. Comparing IBUs among different beers is not as useful. Using the IBU as a marketing tool . . . to each their own!