1. But my own worry today is less that of the overwhelming problem of elemental literacy than it is of the slightly more luxurious problem of the decline in the skill even of he middle-class reader。

参考译文：但是比起基础读写能力不足这一普遍问题，我更担心的是一个看起来不那么紧迫的问题，即中产阶层读者的读写技巧甚至也有所下降.

结构分析：but my own worry is less that of...than it is of..., 使用了比较特殊的比较级结构，be less that of sth than it is of sth。