It is probably more like 25%. What color do you have? If you have a darker color, 20% will look great and match up fine. A light color may just a bit dark. I would rather be at 20 than 35 though. I am doing my white 2010 with 20% on Mon. I had 20% on my 06' Java Black and it looked perfect. I will post pics when finished.
I just did mine with 20% and it looks **** close looking from the outside in but from the inside out it looks to be slightly darker than the rears. Not sure if that is going to change once the tints settle. I just got them done this past Saturday.