Looking to get into an IS500/350 FSport potentially.

I'm currently leasing a '24 GR Corolla and realized I'm looking for something automatic with a paddle shifter manual mode as a daily driver/ferrying friends around mobile and get another manual as my fun car (Planning a corvette or something). I love the GR and with ~1 year 4 months left until my lease ends I'm looking at either buying out the lease, or get into something different, and the IS500's V8 caught my eye, or even the IS350 F Sport with its V6.

Just curious how the IS500 F Sport's 8 speed auto feels? Is it a torque converter? I'm seeing documentation that shifts in the 2025 are supposed to be really quick at 0.1 seconds, any sluggishness at all?