No. My seat is about half-way between two isles. My seat is number 543 or something and the seat to my right is either 6 higher or six lower (I think it's 549). They are right next to each other.
It might be because my seat is the end of one "block" and the next is the start of the next...
I noticed when I took my seat in the east upper this year that there are gaps in the seat numbers. There are about 6 "missing" seats between mine and the seat to my right. Maybe they have the option of squishing the seats together? ???