Integrated Project Delivery (IPD) is an up-and-coming project delivery system distinguished by a multiparty contractual agreement that involves key participants very early in the project timeline, often before the design is started. The popularity of IPD is rising among several organizations due to its perceived benefits to the Architecture/Engineering/Construction (AEC) industry; however, no research studies have shown statistically significant performance differences between IPD and more conventional delivery systems. This study fills the missing gap by evaluating the performance of IPD projects compared to projects delivered using other systems. Although the comprehensive research study completed covers the analysis of 32 different performance metrics, this paper focuses specifically on the schedule performance of IPD. Construction project delivery literature was analyzed to identify schedule performance metrics, which were used to develop a comprehensive data-collection survey that acted as a basis for detailed interviews to gather quantitative data from the construction industry. Univariate data analyses then were conducted to develop the first benchmarks for IPD schedule performance. The results of the study indicate that IPD achieves statistically significant improvements in project delivery speed. The findings provide a more comprehensive understanding of IPD performance by specifically identifying metrics that are affected by this promising delivery system. Both private and public sector projects can benefit from the results which ultimately enhance the AEC industry performance.