Yes and no.
The polygon count of the DOA models are of course long known. The usual count is about 30k for the men and about 40k-60k for the girls. Kasumi's Ninja Gaiden-esque suit is one of the highest in quality:
For any PS3/Xbox360 game this is an already huge amount of polygons! Soul Calibur IV/V models just have about 20-25k polygons but they still look fairly good in comparison.
Ayane's default costume is a slight alteration of her Ninja Gaiden model which had over 100k+ polygons.
This is even today a big amount for a game. You clearly can see the high quality by the very few visible edges the model has in the game. It looks very smooth.
For comparison: Street Fighter V's models have about 60-80k polygons, Marius' model in Ryse has about 80k polygons (they once wanted to use 150k but had to downgrade), Final Fantasy XV models have about 100k (20k just for the hair, the total amount of a Soul Calibur 5 model) and with Tekken 7...I actually have to guess.
But that's not very difficult for a trained...or rather a very nerdy eye like mine. XD You literally can count the polygons on many parts of the model (which is already a good sign for low quality) and thus make a fairly good estimate for the rest of the model. Lucky Chloe is a good example:
Alone the hair with pigtails has obviously less polygons as for example Marie Rose in DOA5. See, you can count them by the visible edges? Now look at the paws which I would argue are even made up of less polygons than many DOA2U models on the original Xbox. They didn't even model the buttons here, they are just textures...
Even if you take one of the character models that were revealed after the big makeover of Tekken 7, when it became Tekken 7 Fated Retribution, you can still fairly easy make out polygon edges on the hair (very low quality for today's standards), the veil (easier visible in motion in the trailer) the arm and shoulder and last but not least the edgy boob, lol.
In Fated Retribution they mostly added fancy post processing effects (more contrast, tinted filters, film grain, chromatic aberration, depth of field etc...) to make it look more impressive and stylish. It definitely works but the actual character models were hardly touched and are imho very disappointing for this generation of games.
After all these ramblings let me try to give you an estimate.
I would say they are made up of about 50k polygons. That's the double amount of the polygons TTT2 had, which is definitely an improvement. The character bodies are less improved (if improved at all) but the clothing probably got most of the extra polygons so they flow and animate better. And they definitely do if you watch footage of the game:
But impressive for today's standards? Nope, not at all.