The phrase "about this delay" is correct and usable in written English.
You can use it when discussing or inquiring about a specific delay in a situation, such as a project or delivery.
Example: "I would like to know more about this delay in the shipment of our order."
Alternatives: "regarding this delay" or "concerning this delay".
"I'm concerned about this delay," Representative John A. Boehner of Ohio, the House Republican leader, said Sunday.
"We're not happy about this delay," said a senior administration official, who spoke on condition of anonymity to avoid inflaming tensions further.
We are sorry about this delay.
To my relief, my boss in Princeton was understanding about this delay.
I know my colleagues in the community aren't thrilled or happy about this delay, but, again, I'm really doing my best.
We make the same assumption as Castro and Liskov [14, 15] about this delay, namely that it does not grow faster than some (usually exponential) function of wall clock time.
"From what I know about Nigerians, this delay is actually going to make them more determined to come out and vote.
Nepal's only international airport has banned larger aid aircrafts from landing because of concerns about the runway but this delay of aid distribution has caused anger for many affected by the disaster.
It's something of a shock to note that this musician, who is, to my mind, one of the greats of his generation (he was born in 1950) should never have been showcased in this capital venue before; I had the privilege of speaking with Zacharias yesterday, and, when I asked him about this odd delay, he admitted that "it's rather late for this" but said that the timing also had an advantage.
Asked about this lengthy delay, GSK said: "We inform the financial markets in relation to all material matters following internal and external legal advice.
But if one starts to feel more anxious about this initial delay, and gets more and more into their own head with negative self-talk or doubt, they will continue to lock up their sphincters and wind up entirely unable to empty their bladder.
