The phrase "are relatively sluggish" is correct and usable in written English.
It can be used to describe something that is slow or lacking in speed or energy compared to other things.
Example: "The processes in the old system are relatively sluggish compared to the new software we implemented."
Alternatives: "are quite slow" or "tend to be lethargic."
William Drewry, an analyst at Donaldson , Lufkin & Jenrette said: "Advertising trends are relatively sluggish versus earlier in the year, but they are not down and out.
"When we think of reptiles, we think of animals that literally creep along the ground and are relatively sluggish," says paleontologist David Unwin of the University of Leicester in the United Kingdom.
The Al3Ti 2DC forms at the liquid Al/TiB2 interface in concentrated Al Ti solutions, but dissolves in dilute Al Ti solutions, although the kinetics of both the formation and dissolution of Al3Ti 2DC are relatively sluggish.
Industrial output and retail sales were relatively sluggish.
Activity has been relatively sluggish since the recession, though prices have improved.
U.S. imports rose briskly; exports were relatively sluggish, and the U.S. trade deficit soared.
For host countries, the overall economic impact of immigration may be positive, even if Britain's growth was relatively sluggish before the crash.
Toulon do not win every game – their start to the Top 14 season had been relatively sluggish before Saturday night – but they are raising the bar for all ambitious club owners.
Second, for the foreseeable future — in contrast to the late 1990s, when the American economy was booming and labor markets were tight — economic growth is likely to be relatively sluggish, as will be labor markets for all but highly skilled workers.
Low light performance is decent, but the camera app is relatively sluggish, occasionally taking a while to capture the image, which sometimes means the subject has left the frame before the picture is taken.
