Probably they have it already done *). It has been in testing and now they are trying to push it to the customers. The ~250 tablet owners are also customers so why not cater them when at this point required work is quite small.

Also the large development and porting work for tablets is mainly done so in the future releases it is more about testing work and having the build infrastructure for tablets.

*) It depends on company, market sector and product but it is normal to test product for weeks before releasing it. I know even some companies that test their products for 6 months and then release it as RCs and only after sufficiently large number of customers are running it, it will become GA.