Yes it is.
Regarding the 4900/P5000 drivers:
Ink Channel Set is changed from
"Gr/LLK/Y/Lc/Lm/Or/M/Lk/C/K"
to
"Gr/LLK/Y/Lc/Lm/Or/K/M/Lk/C/X"
(As the last "MK" is not used, it is marked as "X")
After set up, please delete "Ink Channel Set " from the previous version, as "Ink Channel Set" is now changed.