Being larger, then tend to be stiffer which will translate to more precise steering response. Provided everything else is up to par; ie suspension joints, steering box, steering box mount etc.

IMO, they were a justifiable mod when using the stock style,split sleeve adjusters. Using a newer solid sleeve adjuster, they are overkill, even for a handling application. The 9/16 tie rods with a solid sleeve are capable of supporting somthing in the range of up to 6G worth of loading before failure. This is way more than any stock based suspension could ever deliver, so why add the extra weight of the 11/16 version.

However, they are a popular upgrade.