Bingo! That's always been the case when I've ridden it. I usually aim for the back to avoid getting super wet, but even when I do ride in the back, I get soaked if there's lots of weight in the front (like a row of heavy people, or just more people in the front vs. the back). SKLOOSH!
On a side note, I just rode Hollywood's version of JPRA a few weeks ago...I never realized how much "extra" theming is on the Hollywood version (extra T-Rex at the top of the lift, the Velociraptor feeding paddock, the falling jeep, etc). And DAYAM, that thing got us WET! Soaked the whole dang boat!