There are lots of factors but this does not sound unusual. State probate law gives creditors a certain amount of time to file any claims they may have against the estate. Plus, heirs and beneficiaries have a certain period of time within which to contest the will. Until both of those time periods have run, the executor generally won't make distributions because you just never know whether someone will contest the will or whether estate claims will come in. if the executor distributes everything and then a claim comes in, they can be on the hook. Every state has a different time period but 6 months after the estate was opened in court is pretty typical. May be a little more or less, check state law.
Plus, the executor will probably hold some back for attorneys fees and executor fees. Executor will probably send you an accounting showing the expenses and fees and ask for everyone's approval before distributing.
And if the total estate is over $2 million then federal estate tax is an issue. A few states even have a lower threshold for state estate tax, so that may be an issue.
In any case, a good executor will communicate with you and let you know the general timeline and factors. Call and see what info you can get.
Edit: I see you are in Wisc. If this is a Wisc decedent and the person died in 2007, state estate tax may be an issue since the exemption was only 625K. If the death is in 2008 then it's not an issue.