About a quarter second round trip for a signal to geosynchronous.
That's about 50 times slower than for LEO, assuming the slant distance to the LEO satellite is 500 miles, since it's unlikely it would be directly overhead.
Lock-on to transponder as low as about 42 degrees above the horizon, allowing 3 or 4 satellite to be within range at a time, given an unobstructed ground terminal site.
Given LEO at 480 to 660 mile and without correcting for Earth orbit curvature, worst case slant-range less than 900 miles, a 5 ms transit on first hop to LEO node.