Kinda true. The park was suppose to get a Stealth Flyer in 2000 (located where the go-carts are now) vs XLC in 2001, but plans changed....R.I.P (2001-2007)
Hypersonic's Back Story: "S&S Worldwide", which was the company's first prototype coaster of its kind—Kings Dominion named it Hypersonic XLC. Bringing many screams and disappointments to the park starting in 2001. It was a love/hate type of coaster amongst many. Launching from 0 to 80 mph in 1.8 seconds up a 90° incline, XLC crested a 165-foot hill, and without fully slowing, plummeted down an 90° dive. Next, the coaster performed a banked left turn, went through a smaller banked right turn, and came to a abrupt stop before heading into the station. Was an amazing experience for many fans, but it suffered extended downtime, very low capacity/extensive wait time and was closed for nearly three months at the beginning of the 2002 season. Went through multiple of trains throughout its suffering lifetime. Over years of screams and overwhelming maintenance, XLC took its last lap on October 28, 2007.