I'd imagine it is very similar to the NBA. Here's my hypothesis that I'll test: The number of all star games played by the top -5 outweigh the rest of the draft combined.
Data collected from here. Let's limit it to the 1989 and after since that's when the drafted was limited to two rounds. It could additionally be limited when they removed high school players from the draft, but we'll stick with 1989.
Results. Since 1989, 1,620 players have been drafted. Just 138 players have been drafted and were selected to at least one all star game (8.5%), 47 were selected outside of the lottery picks (34.5%). There have been 471 total all-stars selections. 26 Top 2 draft picks (54 picks total) have played in a combined 130 of those 471 all-star games (27%). Of the 3, 4, and 5 picks, 40 have played in a combined 141 games (30%). 300 Players have been drafted in the top five and 66 have played an AS game (
22%). In total 66 players drafted in the top-5 have played 57% of the all-star games. The remainder of the draft is 3,300 players and just 81 made an all-star game (
2.5%). Where they played in the remaining 46% of games. Outside of the top-5, just six players really stand out and, by themselves, have played in more than half of those all-star games: Kobe (HS), Garnett (HS), Dirk (foreign), Dwayne Wade, Ray Allen, and Paul Pierce.