I installed the following ROMS:
K-JAM_WWE_1010903_106_10110_ship.exe (used 5 days)
then
K-JAM_Italian_1030902_102_ship.exe (used 7 days)
then
RUU_Prodigy_1060204_105_11210_TMO_UK_Ship.exe (used 3 days)
then
Xda_MiniS_LaunchROM_v154102.exe (using from 2 days)
Results
O2 XDA (last one, currently used) absolutely the fastest (but remember to disable O2active application)
K-JAM_WWE_1010903_106_10110_ship.exe (used 5 days)
then
K-JAM_Italian_1030902_102_ship.exe (used 7 days)
then
RUU_Prodigy_1060204_105_11210_TMO_UK_Ship.exe (used 3 days)
then
Xda_MiniS_LaunchROM_v154102.exe (using from 2 days)
Results
O2 XDA (last one, currently used) absolutely the fastest (but remember to disable O2active application)