Matt Cutts of Google recently tweeted to @NielsBoschh that he would be surprised to see an update happen before 2013. Google has been doing Toolbar PageRank update every 3 months or so, but the hiatus has been long this time. Many are also saying that Google may bid farewell to Toolbar PageRank now!
In a Google Webmaster Help video, Matt Cutts came up with an explanation on the decreasing relevance of Toolbar PageRank, stating that recent versions of analytics software doesn’t let users to install toolbar easily and Chrome doesn’t even have a toolbar. This has contributed to Toolbar PageRank lose its relevancy.
Toolbar PageRank is simplified Real PageRank, a complex algorithm which contributes to the search results. However, while Real PageRank probably accrues within hours, the Toolbar PageRank would take time in reflecting it. This time, you may have to wait into 2014 for an update.
Or who knows Google may quietly want it to go away.