[Threadbare]

Following the sun is a win, faster project delivery and lowered cost of development

[kelnos]

Follow the sun is great for on-call rotations, but I'm my experience, for regular project work, the need for a handoff each day ends up being too much overhead. The teams in vastly different time zones wind up working mostly independently on completely different projects.

[rbanffy]

It brings its own set of communication and cross-cultural challenges.

[pdntspa]

That's for stuff that requires 24/7 support, not some harebrained project management technique that will make all your teams hate you