Uhhh... This bust has nothing to do with the problems that the IRS is having with processing tax returns this year. Fraud investigations are on-going every year and the IRS makes a number of similar busts every year. The fraud unit is not connected to the systems that process tax returns.
Most of the problems with early filers this year are related to the IRS efforts to modernize the automated systems that process returns. It appears that they made a rather overly optimistic leap of faith in pushing a far greater number returns into the new MeF system than in prior years, where previously they stepped up MeF processing by much smaller percentages. It appears that the added load on MeF, along with increased deployment of CADE2 (another modernization initiative) is causing processing delays. With a bit of luck they will get things resolved as we move farther into tax season.
A significant part of the "problem" is perceptions, not real delays. Many impatient early filers are hitting the WMR page and burning up phone lines despite it only being one week since processing started. May refunds have already been paid, AHEAD of the published schedules. Of course, you don't hear about those folks very often.
The WMR system locks you out if you hit it repeatedly over a short period of time, to give someone else a fighting chance at getting a status update. People repeatedly calling may get the same treatment form the first level assisters since all calls and status checks are logged by the system. People perceive this as a problem, when in fact it's by design to give someone else a fair shake.
The IRS never guarantees a specific refund date. There are literally thousands of reasons that your refund may be delayed. If you get the dreaded "under review" message, plan on 2 months or more in delays and the IRS won't escalate the matter for 7 WEEKS.