Wrote a whole long review about why I didn't like it, but got bored of my own opinion.

In short:

While clever, the linguistic virus, Sumerian, and religion lessons were long and dull
Characters unbelievable, and didn't really invest in them.
Sex with a minor scene - didn't want that

Did like:
the world
the technology
the prologue bit about pizza delivery. Loved that world building, really great opening! Then the main story wrecked it (for me).