I have found that actual MPG vs WLTP varies from manufacturer to manufacturer, similarly the 0-62 acceleration and, now, with electric cars, the range too. I have a Tuscon, the official MPG is 36 or 37 and I achieve around 33-34. My old X1 officially was something like 42-44, actual 36. Certainly 30 seems thirsty.
We have the T5 R design pro and have struggled to get 30mpg in the summer, we do live in a hilly area with a lot of twists and turns so no previous cars been efficient either. We have seen low 20’s mpg and only 11 miles of electric range. I don’t want to turn this to a negative but this is what I’m getting now so let’s see what it’s like when it freezes.