MS used to have a Knowledge Base article on this (
https://support.microsoft.com/en-us/kb/970154) but it seems to have been deleted. For the article's registry patch to reduce such delays:
1. Start Registry Editor. In Windows 10, go to Windows System> Run, then type regedit in the Run box, and then press ENTER. If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
2. Locate and then select the following registry subkey:
Code:
HKEY_CURRENT_USER\Software\Microsoft\Office\#\Word\Options
where # indicatesthe Office version:
Code:
• Office 2007 - HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Word\Options
• Office 2010 - HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Word\Options
• Office 2013 - HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Word\Options
• Office 2016 - HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Word\Options
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type DelayOleSrvParseDisplayName, and then press ENTER.
5. Right-click DelayOleSrvParseDisplayName, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. On the Edit menu, point to New, and then click DWORD Value.
8. Type NoActivateOleLinkObjAtOpen, and then press ENTER.
9. Right-click NoActivateOleLinkObjAtOpen, and then click Modify.
10. In the Value data box, type 1, and then click OK.
11. On the File menu, click Exit to exit Registry Editor.