Because wolfram alpha was a launch. Bing was a re-branding. So Bing gets all the traffic that MS already had, while trying to carve out a little more of the res

Because wolfram alpha was a launch. Bing was a re-branding. So Bing gets all the traffic that MS already had, while trying to carve out a little more of the rest of the pie. Thus, you should expect to see different launch patterns.