Is English grammar easier than other language?

Robert McCrum, the writer of the influential How the English Language Became the World's Language  has suggested that 'English .. has a grammar of great simplicity" 

The argument for this is broadly as follows:

• English grammar is based on simplified form of German
• Verb conjugation is simple for regular verbs: four  endings for regular English verbs (paint/paints/painted/painting).  French, German & other key languages have  50+.
• There are fewer irregular verbs - and most are irregular in the same way.
• Written & spoken forms are comparatively similar English. 
• Noun and adjectival forms do not divide by gender
• Adjectives do not change form for plural nouns (blue car/blue cars)

A version of this post is included in 50 FAQ about English  ($1.75)