Last night I tried a glass of my first bottle of Costco Chardonnay (Argentia Ridge) and it was very blah. I bottled it over a month ago and that's the recommended waiting time before drinking it. I don't think further aging is going to help it a lot.
About half an hour ago tried it in a white wine spritzer (half bland tasteless chardonnay, half sprite) and it was fit to drink (not bad actually).
Currently I am drinking a home brewed double chocolate milk stout. It's OK but if I ever try another DCMS it won't be using the same recipe as I used for this one (my own half assed concoction).