Statistics just in from compete.com indicate that microblogging service Twitter’s growth was vastly down during the month of May 2009. Twitter.com had been enjoying progressive cumulative traffic growth Since November 2008, with an exceptional growth-spurt during March of this year. However, the figures of traffic growth for May of this year indicate a growth of just 1% on the month, to 19.7 million unique visitors. (If 19.7 million unique visitors feel the urge to visit this site then I wouldn’t turn anyone away if they clicked on a link somewhere.)

During the month of May I reported on the statistics compiled by Quantcast ’s rival, compete.com, which showed a huge traffic growth trend with regard to Twitter; particularly for the months of March and April.

Despite the fact that Twitter has outgrown the New York Times in unique visitor numbers, and, although the figures dwarf in comparison to earlier records, it nevertheless continued to grow during May. But it appears that the good times may be at last coming to an end for Twitter; at least as far as traffic volume with regard to UVs is concerned.

What now? Well twitter still has enough traffic, even if not enough structure, to begin generating a lot of hard income for itself. If they were to use this opportunity wisely in the face of previous growth figures; notwithstanding a forthcoming possible slump in UVs, then they’d be well in the money.

Is this just an end to the previous unsustainable growth; or forewarnings and ominous signs of decline? Your thoughts please.

(Microsoft, on the other hand, have had a busy month: Having piled more of their bounteous supply of megabucks into the launch of Bing, as well as throwing money at a new version of their Zune player; it appears that their efforts have at least begun to pull it off, with traffic to zune.net increasing by a figure of 13% to 708,000 UVs, while Bing managed to pull 635,000 people in: Not bad for a newbie, eh?

Perhaps this will cause the UK Prime Minister, Gordon Brown, to take heart in the now proven fact that things can indeed start working if you throw enough money at them. Hopefully the UK’s financial institutions will follow suit.)