Actually #16 after last night.
But...
#1 Syracuse is only 285th in FT%.
#2 Kansas is 106th.
#3 Kansas State is only 247th.
#4 Duke is 2nd.
#5 Georgetown is 88th.
#347 Alabama A&M is 337th.
#346 Houston Baptist is 111th.
#345 Maryland Baltimore County is 164th.
#344 North Carolina Central is 145th.
#343 Utah Valley is 120th.
So yes the top 5 RPI teams overall do shoot FT's better than the bottom 5, but it is far from a given that the top teams shoot them well while the bottom teams do not. Syracuse and Kansas State are great examples. 4 of the bottom 5 teams shoot FT's better than the D-1 median (174th).