You may want to do a search on this to get more detailed info, as it's been discussed in depth before. But the quick answer is: NO. They were put together years later in most cases (I think they weren't even sold until the late 60's or so) by a third party. None of them are actually
new cards put together
that year. From what I've heard, there are usually no stars and most commons only grade a 5 or 6 at best. Don't expect any 10's, as the cards had been around a bit before they were packaged. Most collectors feel these are WAAAAY overpriced for what you actually get. And worse than the unopened ones are the fake ones people are making and selling now. True rack packs (made by Topps, not a 3rd party) did not come out until 1960.
Hope that helps.
EDIT: Someone opened a Xmas pack in another thread and posted scans, you may want to try and find it. I think it was a '52 pack.