Sort of. Refraction it better looked at from a wave perspective than a particle one, IMO. The wavefront expands at the speed of light, but the wave bounces of

Sort of. Refraction it better looked at from a wave perspective than a particle one, IMO. The wavefront expands at the speed of light, but the wave bounces off of the medium it's traveling through and self interacts in a way that means that the highest probability area moves slower than C despite the edge of the wavefront still moving at C. That smearing is also why the wavelength changes upon refraction. (And obviously leaving concepts like time dilation off the table for simplicity's sake).