Looking at the top of the plant it's not a dwarf Orinoco it's a tall. They vary in height. But dwarf Orinoco stack out at 7-8' and have a very unique look. Foto my picture gallery and click dwarf Orinoco and there is a couple pics of stacked out dwarf Orinocos. One is "image4" other is unlabeled. And both tall and dwarf Orinoco can have red midribs. Just no wine spots! Unless you spill your wine on them
Nice tall Orinoco bunch. Congrats!