Hi KrMalik,
I missed your earlier question because it was appended with your quoted text and only saw it today.
Generally speaking 6 months is a lot but it can happen as per say. So just hang in there and keep emailing CIC once a month with all your details.
If it makes you feel any better, my case took around 10 months (5 people total - husband, wife and 3 kids) but it was due to multiple reasons.
Firstly, embassy had some wrong info about forms on website, so twice returned application unprocessed due to missing forms. Then my employer's lawyer made a mistake, then there was strike in embassy so it held on for a long time, then there was further medicals required for one of our kids. So a lot of factors could affect a file and me being a highly skilled worker and clear cut job offer and stuff, still it took me 10 months to receive visa (though at least 3 other colleagues of mine with similar background and families got it in between 2 and 3 months total from the date of application till receiving passports).