There is a misconception in various posts lately regarding rapid acceleration in EV mode. The commonly held belief that it significantly reduces your EV range is incorrect. Feel free to step on it, and accelerate to your heart's content. Your range will not be significantly reduced, and could, in fact, end up being greater than using a technique of very slow acceleration. Here's why: Electric motors experience very little change in efficiency as torque increases from roughly 25% to near maximum, in fact most maximize efficiency near 50%. I could not find any specific information about the Prius motor/generators (gurus please chime in if you have any), but note the flat efficiency curves on these two examples of vehicle motors: Note the inefficiency below roughly 25% - a range one might consider avoiding if one wishes to get the most power out of each amp supplied by the battery. What about the falloff of amp-hours at higher discharge rates? Don't worry about it. It is not a factor with Lithium Ion batteries. That concern died with the use of Lead-Acid batteries to power EVs, shown as "AGM" in this chart: I live in a community of 35,000, with 10,000 registered electric vehicles (that's right - 1 for every 3.5 residents), and a legacy of using them on a daily basis to get around town for the past 53 years. I am immersed in an EV culture. Part of that culture has been to avoid extremely slow acceleration in order to maximize range, so this is not a new idea - just one that needs to make its way from the cart paths to the streets. Of course your range will suffer at high speeds, but is affected very little by how quickly you accelerate to get there. Step on it, and go have some fun.