The phrase "are appreciably less" is correct and usable in written English.
It can be used to compare quantities or qualities, indicating that one is significantly lower than another.
Example: "The costs of production in the new factory are appreciably less than those in the old facility."
Alternatives: "are significantly lower" or "are considerably reduced."
The Silver Spoon's long grain is appreciably less sticky, and thus drier and harder to work with.
Meanwhile, free of the injuries associated with playing in freezing weather on hard pitches, club medical departments would, happily, be appreciably less busy.
But those who said they hadn't thought much about their ideological leanings -- one in three people -- were appreciably less knowledgeable.
Sides in the second tier have a wage bill of no more than 25% of that of their Premiership counterparts and gate income is appreciably less.
It is appreciably less expensive, especially now, given its economic woes, which sometimes earn it mention in the same paragraph, or even sentence, as Greece.
It's hard to say whether an American hamburger was appreciably less safe to eat the day after a Holstein cow tested positive for bovine spongiform encephalopathy in Washington State last month than it was the day before, but it had sure gotten less appetizing.
The fact that all of the mutants were appreciably less soluble than the wild-type protein is consistent with exposure of hydrophobic groups.
For Charlottetown, the transformation of alternative land use into greenspace to represent the removal of activities from the waterfront and the flooding of susceptible areas diminish the attributed land values (as in Table 2 where greenspace land value per acre in the model is appreciably less than the value for other land use alternatives, notably commercial and residential lands).
He seems to be appreciably less stuck in cement than the other candidates who still have a chance to become president on January 20 , 2009
The groups that would be unfairly penalized include African Americans and lower-income people of all races, whose life expectancy is appreciably less than that of whiter and richer people.
