If network latency is a significant factor, and server storage and processing resources are sufficient, then the author's example of an 800 column table needs redesign.
Break that monster into smaller, more manageable tables and architect your database such that you can obtain exactly the data you need with well indexed joins, cached lookups, etc.
Break that monster into smaller, more manageable tables and architect your database such that you can obtain exactly the data you need with well indexed joins, cached lookups, etc.