thats true, if you have CSQ and a job offer you can visit border and get a work permit and then you can apply for TRV.i heard one guy who got 2 year visitor extension with csq after expiration of PG work permit and visitor visa too ,they said if you have csq then you can take extension for staying in Canada upto 1 to 2 year until you get decision of your PR ,i dont know its exactly true or not