This article suggests that he made a statistically noticeable difference on the court during his career.

"The mid-2000s would end up being the finest stretch of Kirilenko’s career, after which injuries and age eroded his ability. But even after his decline, Kirilenko maintained a solid standard of performance. In Engelmann’s giant 14-year RPM dataset (which encompasses the 2001 through 2014 seasons), Kirilenko ranked 17th overall across all seasons, and he ranked 13th overall during his career (2002-2015) according to Daniel Myers’ value over replacement player (VORP). Both placements far exceed what would be suggested by Kirilenko’s modest conventional numbers."

http://fivethirtyeight.com/datalab/ode-to-the-underrated-andrei-kirilenko-edition/