There's little (if any) perceptible lag, and this is a racing game we're seeing (as in that lag really matters).

ENGADGET

The second sentence is apparently a reference to another study, authored by researcher John Breitner and published in the Nov. 6 issue of the Journal of the American Medical Association, that indicated that estrogen replacement might help prevent Alzheimer's but also that there was a big time lag--about a decade--between taking the drugs and seeing any benefit.

FORBES: Magazine Article

Although consumers may lag in their understanding of the cloud, many large corporations have no trouble seeing the advantages, and are embracing it.

FORBES: Clueless About Cloud? Why It Doesn't Matter