I would say yes based on my results. Before I installed the Orbi I ran 5 separate speed tests on my laptop in various parts of our home. (3 story house - 2700 sq. ft).
I ran tests from each floor on my existing router (TP Link WR1043ND - a 300Mbps Wireless N Gigabit Router). Speeds averaged 43.76Mbps down and 4.35Mbps upload.
After I installed the Orbi, I re-ran the same speed tests in the same locations and speeds now average 62.83Mbps down and 5.80Mbps upload. Significantly faster!
The 2 spots in the house - top floor and basement both went from 28.56Mbps and 21.72 to 64.33 and 63.46 - so much better coverage and the Orbi's base + satellite coverage now provides equal coverage thoughout the entire home.