Probably not. In your ordinary browsing, you're not likely to download anywhere near the entirety of wikipedia. Plus, spreading out your requests over time rather than downloading it all at once is more gentle.
However it suffers the number one torrent issue: they do not tolerate change. This means that
- When an article changes, you need to generate a new torrent - When a new torrent describes the archive, it needs to be downloaded from scratch by all peers, so that the maximum number of peers are available for a newcomer.
I hope you'll understand that this is not the official way to distribute archives...