I do have a question for those of you that have been around the DirectTV block: Is this release timeline normal? IE- have new boxes been announced after only a year of the previous version being in the market?
Generally yes, that is why we have an HR20, 21, 22, 23 and 24, yet all are considered equal by Directv as just HD-DVRs.
That's why if you have an HR23 fail, they may send you an HR21. At this point HR20 has been retired, and HR24 they try to replace like-for-like due to internal DECA and faster chipset.
That said, as they change the boxes every year or so, the change from the HR34-HR44 is a bit more intense than usual changes. The smaller design and significant speed improvements are more than usual evolution.