Google updates – Local gets a push

Further to the growing awareness in SEO circles that Google have boosted the number of page 1 results with 7 listings (see this article from Danny Sullivan) I have seen in searches related to local retailers / businesses a growth in 3 listings on page one with a ‘big foot’ type result for Google Local (see example below).
What is happening here? My guess would be pumping more numbers into Google+ further to the recent Google Places merge.

In this example search of ‘Property Agents’, Google Local gets 7 listings – web results = 3