It has little to do with the time of year ... if it did, everyone would wait. All statistics and number-crunching aside, it's all about supply and demand. Right now, inventories are near record lows ... lots of reasons for it, but there's no need to be over-analytical here. At the moment, there are more qualified buyers looking for homes than there are sellers with properties on the market ... it's that simple. Multiple offer situations are common, and homes often sell for more than the original asking price ... close to a feeding frenzy.
I don't see any advantage to waiting. If your home is in a desirable location, is in excellent condition, and is competitively priced (not to worry ... the market will determine what it should sell for) it will likely go quickly.
If I may be of further assistance, please feel free to contact me. I look forward to hearing from you.