A lot has been written lately about the home cash sales. The reality is that when a seller sells a property they get a wire, check or other property in exchange (not usual but possible)at closing.
Cash sales have been declining and there are only a few states that are still over 50%. There can be a lot of valid reasons for a cash sale. However the measurement was used to judge bank owned and short sale properties.
Since this type of sale is trending down it only makes sense cash sales will also trend lower.
The new mortgage regulations may account for higher cash sales however if you buy a home in the range that you have been pre approved you should be ok. You may find you are competing with a cash buyer. The only difference between a seller accepting a cash offer or financing is their faith in the ability of the buyer to get the loan processed on time for the closing.