Apple has today updated its online store in most countries to reflect the estimated shipping times for the new Mac Pro extending into April. The change was spotted by MacGeneration who noted that the shipping estimates for anyone ordering a Mac Pro now are sitting at April. Previous shipping estimates placed standard availability for the Mac Pro in March of this year, for those ordering in January and the beginning of February.
The change does not necessarily indicate that supplies of the Mac Pro are becoming more constrained, rather that Apple has not made any headway into reducing the wait time for the device. As such, and as we move further into the year, the estimated ship time will naturally extend further until production meets demand.