It looks to me like HBD might have slightly higher rates of OF assists than RL baseball. Here's the results of 10 minutes of analysis:
2009 MLB : 826 OF assists in 129816 player innings in the OF.
That's a rate of .0064 assists / outfielder inning.
I'm in Hamilton. We just finished up regular season 5. I pulled the data for the 75 outfielders with the most PT (25 at each position).. Those 75 players generated the following numbers:
602 assists in 85804 innings played
That's a rate of .0070 assists / outfielder innings.
That's about 10% higher than MLB, not a lot different, by my way of thinking. Moving beyond numbers to speculation, you might be able to argue that the other part time players who made up the other 35% of the OF playing time might be less skilled defensively and would generate a lower assist rate, that would tend to reduce this 10% difference even further. Don't know about that.... Also don't know anything about the choices of managers in baserunner aggressiveness. Is the average setting at 3, or higher. This would certainly influence that, but can't be studied directly
At that rate of .0070 assists / of inning *27 OF innings / game, we're talking about 0.189 assists per team per game, certainly not anything like "2-3 even 4 times a game".