If you consider we only had 3 choices inside for the first 3 games which were against the hardest opponents we faced this season, because players we would have used as starters had GS 4-6 due to being sold or played for 100+ minutes. I think 3-4 was a reasonable prediction, let's not forget we played with two backup choices and one first choice, Parker, who played the first 3 games with GS 6-7.
The team we played Portugal with was dramatically better inside than our starting team.
All said and done I'd say 3-4 was aptly conservative but not unrealistic.