I notice the same thing as Dave, which is actually very common among plants in general. Something called 'transplant shock'. While many plants take to transplanting just fine, most don't 'like' it. During this time the plants don't concentrate much on vegetative growth while it's roots acclimate to the new situation. This period can last from a couple days to a couple weeks depending on the plant species.
For me, with tomatoes, after transplanting them out, I'll get about a week of them just sitting there, looking healthy, but without much new growth. After that a range of 1-2 inches a day is about the normal for tomatoes...sometimes a bit more or a bit less.
