I know when I get a listing I really really encourage people to list immediately unless the house needs work. If you take a new listing and do not put it on the MLS within 48 hours you have to inform the MLS…. It is kind of a pain.
Now maybe the correct way to say it, is that SELLERS may be waiting to list thier homes on the market. I will say I have had a few calls where people are trying to get on the market but are either to busy or finishing up home projects over the next few weeks. Generally most Realtors will try to lock the listing in right away and get it on the market. The only time a Realtor (that I know of) would discourage listing immediately would be for upgrading or cleaning up the home, or due to the winter holidays. My advice to people considering listing in the spring would be to list ASAP to BEAT the inventory rush as the buyers have definitely started to show up.
So if the inventory rush does come, I don’t think it is because brokerages have timed it to be that way.