I’ve updated the beta version of WordPress Google Form v0.46 to beta-6 and made it available for download from this site. This beta update addresses some typos which caused problems when running with debug enabled and temporarily increases the HTTP_API timeout to 15 seconds to chase down a suspected problem with very large Google Spreadsheets. If increasing the timeout works then I will add another setting to the plugin to allow this to be changed on a per site basis.

Download the beta release and please let me know if you run into any issues.