==Then you will no doubt have no trouble explaining how your revision to the title of this thread is compatible with what Darwin actually said about rates of change and occasional instances of stasis
I will defer to the founder of the Church of Darwin to answer your question:
...”The number of intermediate varieties, which have formerly existed on the earth, (must) be truly enormous. Why then is not every geological formation and every stratum full of such intermediate links? Geology assuredly does not reveal any such finely graduated organic chain; and this, perhaps, is the most obvious and gravest objection which can be urged against my theory.”
Darwin, C. (1859)
The Origin of Species (Reprint of the first edition)
Avenel Books, Crown Publishers, New York, 1979, p. 292
In case you’re wondering, and contrary to Darwin’s expectations, further study of the fossil record has made things much worse for Darwin’s “theory” since then:
“The fossil record suggests that the major pulse of diversification of phyla occurs before that of classes, classes before that of orders, and orders before families. This is not to say that each higher taxon originated before species (each phylum, class, or order contained at least one species, genus, family, etc. upon appearance), but the higher taxa do not seem to have diverged through an accumulation of lower taxa.”
Erwin, D., Valentine, J., and Sepkoski, J. (1988)
“A Comparative Study of Diversification Events”
Evolution, vol. 41, p. 1183
You still haven't accepted the fact that your assertion is a lie. Here is Darwin on the subject of rates of evolution:
Species of different genera and classes have not changed at the same rate, or in the same degree. In the oldest tertiary beds a few living shells may still be found in the midst of a multitude of extinct forms. Falconer has given a striking instance of a similar fact, in an existing crocodile associated with many strange and lost mammals and reptiles in the sub-Himalayan deposits. The Silurian Lingula differs but little from the living species of this genus; whereas most of the other Silurian Molluscs and all the Crustaceans have changed greatly. The productions of the land seem to change at a quicker rate than those of the sea, of which a striking instance has lately been observed in Switzerland. There is some reason to believe that organisms, considered high in the scale of nature, change more quickly than those that are low: though there are exceptions to this rule. The amount of organic change, as Pictet has remarked, does not strictly correspond with the succession of our geological formations; so that between each two consecutive formations, the forms of life have seldom changed in exactly the same degree.
Are you simply too stupid to notice?