The phrase "average when it comes" is correct and usable in written English.
It can be used when discussing general tendencies or characteristics in a specific context or subject matter.
Example: "On average, when it comes to customer satisfaction, our service ranks higher than our competitors."
Alternatives: "generally speaking" or "typically in terms of".
The company's Web site says that its safety record is better than the industry's average when it comes to accidents that result in lost time.
Every region in England outside London is below the national average when it comes to productivity.
Pay equity in our state is a huge issue – Michigan is lower than the national average when it comes to pay equity for women.
Judging by the last nine hundred and seventy-two words that I used on Twitter, I'm about average when it comes to feeling upbeat and being personable, and I'm less likely than most people to be depressed or angry.
For as long as powerful firearms remain easily available to private citizens, the United States is likely to remain well above the OECD average when it comes to violent death.
But the past couple of years haven't been average when it comes to federal energy funding.
The World Series champion Boston Red Sox, winners of 108 games in 2018, were around league average when it came to shifting.
However, again, London's figures were higher than the national average when it came to paid trials, with 23 per cent admitting to doing so.
The UK fared better than the EU average when it came to persistent poverty, defined as being in income poverty both in the current year and at least two of the three preceding years.
All 20 ranked above average when it came to savings and investing propensity.
The Senators on the other hand had a TRPS of 201, meaning the team performed better than twice the league average when it came to pay versus performance.
