Moonbeam wrote:OK, I've run some numbers for Lillard and all other guards named to an All-NBA team since 1984 (the earliest year I have playoff data).
The first metric I've looked at is
Playoff Score+, which is a measure of how many additional points per 100 possessions a player scores compared to the opponent's average TS% allowed. In this way, it combines volume and efficiency. Lillard's Playoff Score+ is 1.141, which means his shooting contributed an extra 1.141 points per 100 possessions compared to what would be expected based on opponent TS% allowed. This ranks 26th among the 62 All-NBA guards in the data set. For reference, Lillard's regular season Score+ is 1.799 (which ranks 16th among the 62 players).
Here's a graph for all of the data. Being toward the top right is good in this case. While Lillard's Score+ does drop off in the postseason, it doesn't particularly stand out.

The second metric I've looked at is
Playoff ORtg+ which is a measure of the difference between a player's Offensive Rating minus the average Defensive Rating of the opponent. Lillard's Playoff ORtg+ is 6.656, which means his Offensive Rating in the playoffs is 6.656 per 100 possessions higher than the average opponent Defensive Rating. This ranks 21st among the 62 guards in the data set. For reference, his regular season ORtg+ is 9.084, which ranks 12th.
Here's a graph for the ORtg+ data, where being in the top right corner again is ideal. Again, Lillard drops off a bit in the postseason, but it's not a dramatic dropoff in comparison to other guards.

While these aren't all-inclusive metrics that capture all of a player's offensive contributions, they tell us that Lillard's production indeed drops off a bit in the postseason, but not in any way that is particularly notable. Even with these dropoffs, his production in the postseason ranks among the top half of All-NBA guards by either metric, nearing the top third in playoff ORtg+.
I'll note that none of this takes into account a player's teammates. This is where context needs to be used. Lillard hasn't had many opportunities to draft off of high-caliber offensive players who are a significant focus for the defense, only really in his first two trips to the playoffs with Aldridge. Similar arguments might be made for players like Iverson.