The phrase "are typically high" is correct and usable in written English.
It can be used to describe a common characteristic or trend regarding levels or amounts in a particular context.
Example: "The costs associated with luxury goods are typically high, reflecting their quality and exclusivity."
Alternatives: "are generally elevated" or "tend to be substantial."
"They are typically high school graduates.
They are typically high achievers chosen by a special committee.
Not to mention that frankfurters are typically high in fat and — shudders!
Vegetarian diets are typically high in fiber, increasing the risk that nutrients will pass through the body before they are fully used, and weight loss may occur.
As it happens, the present conditions are perfect.Upfront fixed costs for infrastructure projects are typically high and operating costs relatively low.
With standard room rates starting at $348 a night and the most famous nearby attraction, the Yosemite Falls, most likely dry or frozen by late December, expectations for a hotel in full Christmas glory are typically high.
The blanking presses are typically high speed, punching out from the coils as many as 21 planchets per stroke at 100 or more strokes per minute, the scissel being returned to the melting pot.
Despite the economic downturn in Europe and the United States, which is beginning to have a more significant impact on Asian economies, Mr. Singh said he believed the time was still right to introduce credit cards for high-net-worth individuals, who are "typically high spending and low risk".
Porgies, sometimes called sea breams, are typically high-backed snapper- or grunt-like fishes.
D-League games are typically high-scoring affairs — the Legends, for instance, scored sixty-eight points in the first half — but that, evidently, is not enough to hold fans' interest.
Doctors and public health experts said the holidays are typically high-volume periods for hospitals, but this year has been exceptional, a fact doctors blamed on this year's nasty flu outbreak.
